diff --git a/test/__tests__/__snapshots__/arg-parsing.js.snap b/test/__tests__/__snapshots__/arg-parsing.js.snap
index 3924dc8..5873143 100644
--- a/test/__tests__/__snapshots__/arg-parsing.js.snap
+++ b/test/__tests__/__snapshots__/arg-parsing.js.snap
@@ -1,69 +1,86 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`allow overriding flags (stderr) 1`] = `""`;
-
-exports[`allow overriding flags (write) 1`] = `[]`;
-
-exports[`boolean flags do not swallow the next argument (stderr) 1`] = `""`;
-
-exports[`boolean flags do not swallow the next argument (stdout) 1`] = `"console.log('could be single quote and without semi');"`;
-
-exports[`boolean flags do not swallow the next argument (write) 1`] = `[]`;
-
-exports[`negated options work (stderr) 1`] = `""`;
+exports[`allow overriding flags  1`] = `
+{
+  "stderr": "",
+  "write": [],
+}
+`;
 
-exports[`negated options work (stdout) 1`] = `"console.log("could be single quote and without semi")"`;
+exports[`boolean flags do not swallow the next argument  1`] = `
+{
+  "stderr": "",
+  "stdout": "console.log('could be single quote and without semi');",
+  "write": [],
+}
+`;
 
-exports[`negated options work (write) 1`] = `[]`;
+exports[`negated options work  1`] = `
+{
+  "stderr": "",
+  "stdout": "console.log("could be single quote and without semi")",
+  "write": [],
+}
+`;
 
-exports[`number file/dir (stdout) 1`] = `"1/file-in-dir-named-1.js"`;
+exports[`number file/dir  1`] = `
+{
+  "stdout": "1/file-in-dir-named-1.js",
+}
+`;
 
-exports[`number file/dir (stdout) 2`] = `"2.2/file-in-dir-named-2.2.js"`;
+exports[`number file/dir  2`] = `
+{
+  "stdout": "2.2/file-in-dir-named-2.2.js",
+}
+`;
 
-exports[`number file/dir (stdout) 3`] = `"3"`;
+exports[`number file/dir  3`] = `
+{
+  "stdout": "3",
+}
+`;
 
-exports[`number file/dir (stdout) 4`] = `"4.44"`;
+exports[`number file/dir  4`] = `
+{
+  "stdout": "4.44",
+}
+`;
 
-exports[`number file/dir (stdout) 5`] = `
-"1/file-in-dir-named-1.js
+exports[`number file/dir  5`] = `
+{
+  "stdout": "1/file-in-dir-named-1.js
 2.2/file-in-dir-named-2.2.js
 3
-4.44"
-`;
-
-exports[`options with \`cliName\` should not allow to pass directly (stderr) 1`] = `
-"[warn] Ignored unknown option --filepath=file.js.
-[error] No parser and no file path given, couldn't infer a parser."
+4.44",
+}
 `;
 
-exports[`options with \`cliName\` should not allow to pass directly (stdout) 1`] = `"prettier();"`;
-
-exports[`options with \`cliName\` should not allow to pass directly (stdout) 2`] = `""`;
-
-exports[`unknown negated options are errored (stderr) 1`] = `
-"
+exports[`unknown negated options are errored  1`] = `
+{
+  "stderr": "
   Unknown option: "unknown"
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`unknown negated options are errored (stdout) 1`] = `""`;
-
-exports[`unknown negated options are errored (write) 1`] = `[]`;
-
-exports[`unknown options are errored (stderr) 1`] = `
-"
+exports[`unknown options are errored  1`] = `
+{
+  "stderr": "
   Unknown option: "unknown"
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`unknown options are errored (stdout) 1`] = `""`;
-
-exports[`unknown options are errored (write) 1`] = `[]`;
-
-exports[`unknown options may trigger a suggestion \`_\` (stderr) 1`] = `
-"
+exports[`unknown options may trigger a suggestion \`_\`  1`] = `
+{
+  "stderr": "
   Unknown option: "a". Did you mean "v"?
-"
+",
+  "stdout": "",
+}
 `;
-
-exports[`unknown options may trigger a suggestion \`_\` (stdout) 1`] = `""`;
diff --git a/test/__tests__/__snapshots__/check.js.snap b/test/__tests__/__snapshots__/check.js.snap
index 4267983..5c4ab15 100644
--- a/test/__tests__/__snapshots__/check.js.snap
+++ b/test/__tests__/__snapshots__/check.js.snap
@@ -1,33 +1,41 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`--checks should print the number of files that need formatting (stderr) 1`] = `
-"[warn] unformatted.js
+exports[`--checks should print the number of files that need formatting  1`] = `
+{
+  "stderr": "[warn] unformatted.js
 [warn] unformatted2.js
-[warn] Code style issues found in 2 files. Run Prettier with --write to fix."
+[warn] Code style issues found in 2 files. Run Prettier with --write to fix.",
+  "stdout": "Checking formatting...",
+  "write": [],
+}
 `;
 
-exports[`--checks should print the number of files that need formatting (stdout) 1`] = `"Checking formatting..."`;
-
-exports[`--checks should print the number of files that need formatting (write) 1`] = `[]`;
-
-exports[`--checks works in CI just as in a non-TTY mode (stderr) 1`] = `
-"[warn] unformatted.js
-[warn] Code style issues found in 1 file. Run Prettier with --write to fix."
+exports[`--checks works in CI just as in a non-TTY mode  1`] = `
+{
+  "stderr": "[warn] unformatted.js
+[warn] Code style issues found in 1 file. Run Prettier with --write to fix.",
+  "stdout": "Checking formatting...",
+  "write": [],
+}
 `;
 
-exports[`--checks works in CI just as in a non-TTY mode (stderr) 2`] = `
-"[warn] unformatted.js
-[warn] Code style issues found in 1 file. Run Prettier with --write to fix."
+exports[`--checks works in CI just as in a non-TTY mode  2`] = `
+{
+  "stderr": "[warn] unformatted.js
+[warn] Code style issues found in 1 file. Run Prettier with --write to fix.",
+  "stdout": "Checking formatting...",
+  "write": [],
+}
 `;
 
-exports[`--checks works in CI just as in a non-TTY mode (stdout) 1`] = `"Checking formatting..."`;
-
-exports[`--checks works in CI just as in a non-TTY mode (stdout) 2`] = `"Checking formatting..."`;
-
-exports[`--checks works in CI just as in a non-TTY mode (write) 1`] = `[]`;
-
-exports[`--checks works in CI just as in a non-TTY mode (write) 2`] = `[]`;
-
-exports[`checks stdin with --check (write) 1`] = `[]`;
+exports[`checks stdin with --check  1`] = `
+{
+  "write": [],
+}
+`;
 
-exports[`checks stdin with -c (alias for --check) (write) 1`] = `[]`;
+exports[`checks stdin with -c (alias for --check)  1`] = `
+{
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/cursor-offset.js.snap b/test/__tests__/__snapshots__/cursor-offset.js.snap
index bdc1314..a0c2b2f 100644
--- a/test/__tests__/__snapshots__/cursor-offset.js.snap
+++ b/test/__tests__/__snapshots__/cursor-offset.js.snap
@@ -1,7 +1,8 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`cursorOffset should not be affected by full-width character (stdout) 1`] = `
-"const x = [
+exports[`cursorOffset should not be affected by full-width character  1`] = `
+{
+  "stdout": "const x = [
   "中文",
   "中文",
   "中文",
@@ -13,13 +14,15 @@ exports[`cursorOffset should not be affected by full-width character (stdout) 1`
   "中文",
   "中文",
   "中文",
-];"
+];",
+  "write": [],
+}
 `;
 
-exports[`cursorOffset should not be affected by full-width character (write) 1`] = `[]`;
-
-exports[`write cursorOffset to stderr with --cursor-offset <int> (stderr) 1`] = `"1"`;
-
-exports[`write cursorOffset to stderr with --cursor-offset <int> (stdout) 1`] = `"1;"`;
-
-exports[`write cursorOffset to stderr with --cursor-offset <int> (write) 1`] = `[]`;
+exports[`write cursorOffset to stderr with --cursor-offset <int>  1`] = `
+{
+  "stderr": "1",
+  "stdout": "1;",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/early-exit.js.snap b/test/__tests__/__snapshots__/early-exit.js.snap
index 214fca3..6f53037 100644
--- a/test/__tests__/__snapshots__/early-exit.js.snap
+++ b/test/__tests__/__snapshots__/early-exit.js.snap
@@ -1,9 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`show usage with --help (stderr) 1`] = `""`;
-
-exports[`show usage with --help (stdout) 1`] = `
-"  
+exports[`show usage with --help  1`] = `
+{
+  "stderr": "",
+  "stdout": "  
   prettier 3.3.3
   
   USAGE
@@ -131,81 +131,84 @@ exports[`show usage with --help (stdout) 1`] = `
     --require-pragma          Require either "@prettier" or "@format" to be present in the file's first docblock comment in order for it to be formatted
                               Defaults to "false"
     --stdin-filepath <path>   Path to the file to pretend that stdin comes from
-    "
+    ",
+  "write": [],
+}
 `;
 
-exports[`show usage with --help (write) 1`] = `[]`;
-
-exports[`show version with --version (stderr) 1`] = `""`;
-
-exports[`show version with --version (write) 1`] = `[]`;
+exports[`show version with --version  1`] = `
+{
+  "stderr": "",
+  "write": [],
+}
+`;
 
-exports[`throw error with --check + --list-different (stderr) 1`] = `
-"
+exports[`throw error with --check + --list-different  1`] = `
+{
+  "stderr": "
   Incompatible options: "check" and "list-different" cannot be used together
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw error with --check + --list-different (stdout) 1`] = `""`;
-
-exports[`throw error with --check + --list-different (write) 1`] = `[]`;
-
-exports[`throw error with --check + --write (stderr) 1`] = `
-"
+exports[`throw error with --check + --write  1`] = `
+{
+  "stderr": "
   Incompatible options: "check" and "write" cannot be used together
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw error with --check + --write (stdout) 1`] = `""`;
-
-exports[`throw error with --check + --write (write) 1`] = `[]`;
-
-exports[`throw error with --list-different + --write (stderr) 1`] = `
-"
+exports[`throw error with --list-different + --write  1`] = `
+{
+  "stderr": "
   Incompatible options: "list-different" and "write" cannot be used together
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw error with --list-different + --write (stdout) 1`] = `""`;
-
-exports[`throw error with --list-different + --write (write) 1`] = `[]`;
-
-exports[`throw error with something unexpected (stderr) 1`] = `
-"
+exports[`throw error with something unexpected  1`] = `
+{
+  "stderr": "
   Expected at least one target file/dir/glob
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw error with something unexpected (stdout) 1`] = `""`;
-
-exports[`throw error with something unexpected (write) 1`] = `[]`;
-
-exports[`throw unsupported error with --file-info (stderr) 1`] = `
-"
+exports[`throw unsupported error with --file-info  1`] = `
+{
+  "stderr": "
   The "--file-info" option is not currently supported, please open an issue on GitHub if you need it
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw unsupported error with --file-info (stdout) 1`] = `""`;
-
-exports[`throw unsupported error with --file-info (write) 1`] = `[]`;
-
-exports[`throw unsupported error with --find-config-path (stderr) 1`] = `
-"
+exports[`throw unsupported error with --find-config-path  1`] = `
+{
+  "stderr": "
   Unknown option: "find-config-path"
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`throw unsupported error with --find-config-path (stdout) 1`] = `""`;
-
-exports[`throw unsupported error with --find-config-path (write) 1`] = `[]`;
-
-exports[`throw unsupported error with --support-info (stderr) 1`] = `
-"
+exports[`throw unsupported error with --support-info  1`] = `
+{
+  "stderr": "
   The "--support-info" option is not currently supported, please open an issue on GitHub if you need it
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
-
-exports[`throw unsupported error with --support-info (stdout) 1`] = `""`;
-
-exports[`throw unsupported error with --support-info (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/error-on-unmatched-pattern.js.snap b/test/__tests__/__snapshots__/error-on-unmatched-pattern.js.snap
index 327d815..d0d5bff 100644
--- a/test/__tests__/__snapshots__/error-on-unmatched-pattern.js.snap
+++ b/test/__tests__/__snapshots__/error-on-unmatched-pattern.js.snap
@@ -1,37 +1,41 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`error on unmatched pattern (stderr) 1`] = `"[error] No files matching the given patterns were found."`;
-
-exports[`error on unmatched pattern (stdout) 1`] = `""`;
-
-exports[`error on unmatched pattern (write) 1`] = `[]`;
-
-exports[`error on unmatched pattern when 2nd glob has no match, by default (stderr) 1`] = `""`;
+exports[`error on unmatched pattern  1`] = `
+{
+  "stderr": "[error] No files matching the given patterns were found.",
+  "stdout": "",
+  "write": [],
+}
+`;
 
-exports[`error on unmatched pattern when 2nd glob has no match, by default (stdout) 1`] = `
-"const hello = "there";
+exports[`error on unmatched pattern when 2nd glob has no match, by default  1`] = `
+{
+  "stderr": "",
+  "stdout": "const hello = "there";
 {
   "hello": "there"
 }
-hello: there"
+hello: there",
+  "write": [],
+}
 `;
 
-exports[`error on unmatched pattern when 2nd glob has no match, by default (write) 1`] = `[]`;
-
-exports[`no error on unmatched pattern (stderr) 1`] = `""`;
-
-exports[`no error on unmatched pattern (stdout) 1`] = `"const hello = "there";"`;
-
-exports[`no error on unmatched pattern (write) 1`] = `[]`;
-
-exports[`no error on unmatched pattern when 2nd glob has no match, with flag (stderr) 1`] = `""`;
+exports[`no error on unmatched pattern  1`] = `
+{
+  "stderr": "",
+  "stdout": "const hello = "there";",
+  "write": [],
+}
+`;
 
-exports[`no error on unmatched pattern when 2nd glob has no match, with flag (stdout) 1`] = `
-"const hello = "there";
+exports[`no error on unmatched pattern when 2nd glob has no match, with flag  1`] = `
+{
+  "stderr": "",
+  "stdout": "const hello = "there";
 {
   "hello": "there"
 }
-hello: there"
+hello: there",
+  "write": [],
+}
 `;
-
-exports[`no error on unmatched pattern when 2nd glob has no match, with flag (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/ignore-absolute-path.js.snap b/test/__tests__/__snapshots__/ignore-absolute-path.js.snap
index bf1f4a6..2e6692d 100644
--- a/test/__tests__/__snapshots__/ignore-absolute-path.js.snap
+++ b/test/__tests__/__snapshots__/ignore-absolute-path.js.snap
@@ -1,7 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`support absolute filename (stderr) 1`] = `""`;
-
-exports[`support absolute filename (stdout) 1`] = `"regular-module.js"`;
-
-exports[`support absolute filename (write) 1`] = `[]`;
+exports[`support absolute filename  1`] = `
+{
+  "stderr": "",
+  "stdout": "regular-module.js",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/ignore-emoji.js.snap b/test/__tests__/__snapshots__/ignore-emoji.js.snap
index 51dddc3..5fd372c 100644
--- a/test/__tests__/__snapshots__/ignore-emoji.js.snap
+++ b/test/__tests__/__snapshots__/ignore-emoji.js.snap
@@ -1,13 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`ignores file name contains emoji (stderr) 1`] = `""`;
-
-exports[`ignores file name contains emoji (stdout) 1`] = `"not-ignored.js"`;
-
-exports[`ignores file name contains emoji (write) 1`] = `[]`;
-
-exports[`stdin (stderr) 1`] = `""`;
-
-exports[`stdin (stdout) 1`] = `".name {                         display: none; }"`;
-
-exports[`stdin (write) 1`] = `[]`;
+exports[`ignores file name contains emoji  1`] = `
+{
+  "stderr": "",
+  "stdout": "not-ignored.js",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/ignore-folder.js.snap b/test/__tests__/__snapshots__/ignore-folder.js.snap
index 930f12a..1c15942 100644
--- a/test/__tests__/__snapshots__/ignore-folder.js.snap
+++ b/test/__tests__/__snapshots__/ignore-folder.js.snap
@@ -1,17 +1,19 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`ignores files in ignored folders (stderr) 1`] = `""`;
-
-exports[`ignores files in ignored folders (stdout) 1`] = `"not-ignored.js"`;
-
-exports[`ignores files in ignored folders (write) 1`] = `[]`;
-
-exports[`ignores ignore files when processing stdin (stderr) 1`] = `""`;
+exports[`ignores files in ignored folders  1`] = `
+{
+  "stderr": "",
+  "stdout": "not-ignored.js",
+  "write": [],
+}
+`;
 
-exports[`ignores ignore files when processing stdin (stdout) 1`] = `
-".name {
+exports[`ignores ignore files when processing stdin  1`] = `
+{
+  "stderr": "",
+  "stdout": ".name {
   display: none;
-}"
+}",
+  "write": [],
+}
 `;
-
-exports[`ignores ignore files when processing stdin (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/ignore-in-subdirectories.js.snap b/test/__tests__/__snapshots__/ignore-in-subdirectories.js.snap
index 49a61e6..1b5e105 100644
--- a/test/__tests__/__snapshots__/ignore-in-subdirectories.js.snap
+++ b/test/__tests__/__snapshots__/ignore-in-subdirectories.js.snap
@@ -1,33 +1,47 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`formats files when executing in a subdirectory (stderr) 1`] = `""`;
-
-exports[`formats files when executing in a subdirectory (stderr) 2`] = `""`;
-
-exports[`formats files when executing in a subdirectory (stdout) 1`] = `"should-not-ignore.js"`;
-
-exports[`formats files when executing in a subdirectory (stdout) 2`] = `"should-not-ignore.js"`;
-
-exports[`formats files when executing in a subdirectory (write) 1`] = `[]`;
-
-exports[`formats files when executing in a subdirectory (write) 2`] = `[]`;
-
-exports[`formats files when executing in a subdirectory and using stdin (stderr) 1`] = `""`;
-
-exports[`formats files when executing in a subdirectory and using stdin (write) 1`] = `[]`;
-
-exports[`ignore files when executing in a subdirectory and using stdin (stderr) 1`] = `""`;
-
-exports[`ignore files when executing in a subdirectory and using stdin (write) 1`] = `[]`;
-
-exports[`ignores files when executing in a subdirectory (stderr) 1`] = `""`;
-
-exports[`ignores files when executing in a subdirectory (stderr) 2`] = `""`;
-
-exports[`ignores files when executing in a subdirectory (stdout) 1`] = `""`;
-
-exports[`ignores files when executing in a subdirectory (stdout) 2`] = `""`;
-
-exports[`ignores files when executing in a subdirectory (write) 1`] = `[]`;
-
-exports[`ignores files when executing in a subdirectory (write) 2`] = `[]`;
+exports[`formats files when executing in a subdirectory  1`] = `
+{
+  "stderr": "",
+  "stdout": "should-not-ignore.js",
+  "write": [],
+}
+`;
+
+exports[`formats files when executing in a subdirectory  2`] = `
+{
+  "stderr": "",
+  "stdout": "should-not-ignore.js",
+  "write": [],
+}
+`;
+
+exports[`formats files when executing in a subdirectory and using stdin  1`] = `
+{
+  "stderr": "",
+  "write": [],
+}
+`;
+
+exports[`ignore files when executing in a subdirectory and using stdin  1`] = `
+{
+  "stderr": "",
+  "write": [],
+}
+`;
+
+exports[`ignores files when executing in a subdirectory  1`] = `
+{
+  "stderr": "",
+  "stdout": "",
+  "write": [],
+}
+`;
+
+exports[`ignores files when executing in a subdirectory  2`] = `
+{
+  "stderr": "",
+  "stdout": "",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/ignore-relative-path.js.snap b/test/__tests__/__snapshots__/ignore-relative-path.js.snap
index 28dc1c3..09bd26f 100644
--- a/test/__tests__/__snapshots__/ignore-relative-path.js.snap
+++ b/test/__tests__/__snapshots__/ignore-relative-path.js.snap
@@ -1,11 +1,11 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`support relative paths (stderr) 1`] = `""`;
-
-exports[`support relative paths (stdout) 1`] = `
-"level1-glob/level2-glob/level3-glob/shouldNotBeIgnored.scss
+exports[`support relative paths  1`] = `
+{
+  "stderr": "",
+  "stdout": "level1-glob/level2-glob/level3-glob/shouldNotBeIgnored.scss
 level1-glob/shouldNotBeIgnored.js
-shouldNotBeIgnored.js"
+shouldNotBeIgnored.js",
+  "write": [],
+}
 `;
-
-exports[`support relative paths (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/ignore-unknown.js.snap b/test/__tests__/__snapshots__/ignore-unknown.js.snap
index 247fef9..72c4004 100644
--- a/test/__tests__/__snapshots__/ignore-unknown.js.snap
+++ b/test/__tests__/__snapshots__/ignore-unknown.js.snap
@@ -1,64 +1,75 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Ignored file (stderr) 1`] = `""`;
-
-exports[`Ignored file (stdout) 1`] = `""`;
-
-exports[`Ignored file (write) 1`] = `[]`;
-
-exports[`None exist file (stderr) 1`] = `"[error] No files matching the given patterns were found."`;
-
-exports[`None exist file (stdout) 1`] = `""`;
-
-exports[`None exist file (write) 1`] = `[]`;
-
-exports[`Not matching pattern (stderr) 1`] = `"[error] No files matching the given patterns were found."`;
-
-exports[`Not matching pattern (stdout) 1`] = `""`;
-
-exports[`Not matching pattern (write) 1`] = `[]`;
-
-exports[`ignore-unknown alias (stdout) 1`] = `
-"javascript.js
-override.as-js-file"
+exports[`Ignored file  1`] = `
+{
+  "stderr": "",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`ignore-unknown check (stderr) 1`] = `
-"[warn] javascript.js
-[warn] override.as-js-file
-[warn] Code style issues found in 2 files. Run Prettier with --write to fix."
+exports[`None exist file  1`] = `
+{
+  "stderr": "[error] No files matching the given patterns were found.",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`ignore-unknown check (stdout) 1`] = `"Checking formatting..."`;
+exports[`Not matching pattern  1`] = `
+{
+  "stderr": "[error] No files matching the given patterns were found.",
+  "stdout": "",
+  "write": [],
+}
+`;
 
-exports[`ignore-unknown check (write) 1`] = `[]`;
+exports[`ignore-unknown alias  1`] = `
+{
+  "stdout": "javascript.js
+override.as-js-file",
+}
+`;
 
-exports[`ignore-unknown dir (stdout) 1`] = `
-"javascript.js
-override.as-js-file"
+exports[`ignore-unknown check  1`] = `
+{
+  "stderr": "[warn] javascript.js
+[warn] override.as-js-file
+[warn] Code style issues found in 2 files. Run Prettier with --write to fix.",
+  "stdout": "Checking formatting...",
+  "write": [],
+}
 `;
 
-exports[`ignore-unknown pattern (stdout) 1`] = `
-"javascript.js
-override.as-js-file"
+exports[`ignore-unknown dir  1`] = `
+{
+  "stdout": "javascript.js
+override.as-js-file",
+}
 `;
 
-exports[`ignore-unknown write (stdout) 1`] = `
-"javascript.js
-override.as-js-file"
+exports[`ignore-unknown pattern  1`] = `
+{
+  "stdout": "javascript.js
+override.as-js-file",
+}
 `;
 
-exports[`ignore-unknown write (write) 1`] = `
-[
-  {
-    "content": "const foo = "bar";
+exports[`ignore-unknown write  1`] = `
+{
+  "stdout": "javascript.js
+override.as-js-file",
+  "write": [
+    {
+      "content": "const foo = "bar";
 ",
-    "filename": "javascript.js",
-  },
-  {
-    "content": "const foo = "bar";
+      "filename": "javascript.js",
+    },
+    {
+      "content": "const foo = "bar";
 ",
-    "filename": "override.as-js-file",
-  },
-]
+      "filename": "override.as-js-file",
+    },
+  ],
+}
 `;
diff --git a/test/__tests__/__snapshots__/ignore-vcs-files.js.snap b/test/__tests__/__snapshots__/ignore-vcs-files.js.snap
index b103cd4..e9687e7 100644
--- a/test/__tests__/__snapshots__/ignore-vcs-files.js.snap
+++ b/test/__tests__/__snapshots__/ignore-vcs-files.js.snap
@@ -1,17 +1,19 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`does not ignore files in version control systems, if manually provided (stderr) 1`] = `""`;
-
-exports[`does not ignore files in version control systems, if manually provided (stdout) 1`] = `
-".hg/file.js
+exports[`does not ignore files in version control systems, if manually provided  1`] = `
+{
+  "stderr": "",
+  "stdout": ".hg/file.js
 .svn/file.js
-file.js"
+file.js",
+  "write": [],
+}
 `;
 
-exports[`does not ignore files in version control systems, if manually provided (write) 1`] = `[]`;
-
-exports[`ignores files in version control systems, if discovered (stderr) 1`] = `""`;
-
-exports[`ignores files in version control systems, if discovered (stdout) 1`] = `"file.js"`;
-
-exports[`ignores files in version control systems, if discovered (write) 1`] = `[]`;
+exports[`ignores files in version control systems, if discovered  1`] = `
+{
+  "stderr": "",
+  "stdout": "file.js",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/invalid-ignore.js.snap b/test/__tests__/__snapshots__/invalid-ignore.js.snap
index 7ce471b..75c29f0 100644
--- a/test/__tests__/__snapshots__/invalid-ignore.js.snap
+++ b/test/__tests__/__snapshots__/invalid-ignore.js.snap
@@ -1,7 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`ignores .prettierignore folder (stderr) 1`] = `""`;
-
-exports[`ignores .prettierignore folder (stdout) 1`] = `""`;
-
-exports[`ignores .prettierignore folder (write) 1`] = `[]`;
+exports[`ignores .prettierignore folder  1`] = `
+{
+  "stderr": "",
+  "stdout": "",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/list-different.js.snap b/test/__tests__/__snapshots__/list-different.js.snap
index a751bdf..57e5998 100644
--- a/test/__tests__/__snapshots__/list-different.js.snap
+++ b/test/__tests__/__snapshots__/list-different.js.snap
@@ -1,17 +1,29 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`--list-different works in CI just as in a non-TTY mode (stderr) 1`] = `""`;
-
-exports[`--list-different works in CI just as in a non-TTY mode (stderr) 2`] = `""`;
-
-exports[`--list-different works in CI just as in a non-TTY mode (stdout) 1`] = `"unformatted.js"`;
-
-exports[`--list-different works in CI just as in a non-TTY mode (stdout) 2`] = `"unformatted.js"`;
-
-exports[`--list-different works in CI just as in a non-TTY mode (write) 1`] = `[]`;
-
-exports[`--list-different works in CI just as in a non-TTY mode (write) 2`] = `[]`;
-
-exports[`checks stdin with --list-different (write) 1`] = `[]`;
-
-exports[`checks stdin with -l (alias for --list-different) (write) 1`] = `[]`;
+exports[`--list-different works in CI just as in a non-TTY mode  1`] = `
+{
+  "stderr": "",
+  "stdout": "unformatted.js",
+  "write": [],
+}
+`;
+
+exports[`--list-different works in CI just as in a non-TTY mode  2`] = `
+{
+  "stderr": "",
+  "stdout": "unformatted.js",
+  "write": [],
+}
+`;
+
+exports[`checks stdin with --list-different  1`] = `
+{
+  "write": [],
+}
+`;
+
+exports[`checks stdin with -l (alias for --list-different)  1`] = `
+{
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/patterns-glob.js.snap b/test/__tests__/__snapshots__/patterns-glob.js.snap
index 510a4c6..7a53642 100644
--- a/test/__tests__/__snapshots__/patterns-glob.js.snap
+++ b/test/__tests__/__snapshots__/patterns-glob.js.snap
@@ -1,104 +1,116 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`fixtures-1: Should match all files (stderr) 1`] = `""`;
-
-exports[`fixtures-1: Should match all files (stdout) 1`] = `
-"!file.js
+exports[`fixtures-1: Should match all files  1`] = `
+{
+  "stderr": "",
+  "stdout": "!file.js
 a.js
-b.js"
+b.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-1: Should match all files (write) 1`] = `[]`;
-
-exports[`fixtures-1: Should match files except \`a.js\` (stderr) 1`] = `""`;
-
-exports[`fixtures-1: Should match files except \`a.js\` (stdout) 1`] = `
-"!file.js
-b.js"
+exports[`fixtures-1: Should match files except \`a.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "!file.js
+b.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-1: Should match files except \`a.js\` (write) 1`] = `[]`;
-
-exports[`fixtures-2: Should match \`a.js\` and \`!b.js\` (stderr) 1`] = `""`;
-
-exports[`fixtures-2: Should match \`a.js\` and \`!b.js\` (stdout) 1`] = `
-"!b.js
-a.js"
+exports[`fixtures-2: Should match \`a.js\` and \`!b.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "!b.js
+a.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-2: Should match \`a.js\` and \`!b.js\` (write) 1`] = `[]`;
-
-exports[`fixtures-2: Should match all js files and all supported files in the '!dir.js' directory (stderr) 1`] = `""`;
-
-exports[`fixtures-2: Should match all js files and all supported files in the '!dir.js' directory (stdout) 1`] = `
-"!b.js
+exports[`fixtures-2: Should match all js files and all supported files in the '!dir.js' directory  1`] = `
+{
+  "stderr": "",
+  "stdout": "!b.js
 !dir.js/1.css
 !dir.js/2.css
-a.js"
+a.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-2: Should match all js files and all supported files in the '!dir.js' directory (write) 1`] = `[]`;
-
-exports[`fixtures-2: Should only match \`!b.js\` (stderr) 1`] = `""`;
-
-exports[`fixtures-2: Should only match \`!b.js\` (stdout) 1`] = `"!b.js"`;
-
-exports[`fixtures-2: Should only match \`!b.js\` (write) 1`] = `[]`;
-
-exports[`fixtures-3: Should match \`outside.js\`, \`dir/inside.js\` and \`dir/node_modules/in-node_modules.js\` (stderr) 1`] = `""`;
+exports[`fixtures-2: Should only match \`!b.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "!b.js",
+  "write": [],
+}
+`;
 
-exports[`fixtures-3: Should match \`outside.js\`, \`dir/inside.js\` and \`dir/node_modules/in-node_modules.js\` (stdout) 1`] = `
-"dir/inside.js
+exports[`fixtures-3: Should match \`outside.js\`, \`dir/inside.js\` and \`dir/node_modules/in-node_modules.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "dir/inside.js
 dir/node_modules/in-node_modules.js
-outside.js"
+outside.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-3: Should match \`outside.js\`, \`dir/inside.js\` and \`dir/node_modules/in-node_modules.js\` (write) 1`] = `[]`;
-
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (existing) (stderr) 1`] = `""`;
-
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (existing) (stdout) 1`] = `
-"dir/.svn/in-svn.js
-outside.js"
+exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (existing)  1`] = `
+{
+  "stderr": "",
+  "stdout": "dir/.svn/in-svn.js
+outside.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (existing) (write) 1`] = `[]`;
-
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (nonexisting) (stderr) 1`] = `""`;
-
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (nonexisting) (stdout) 1`] = `"outside.js"`;
-
-exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (nonexisting) (write) 1`] = `[]`;
-
-exports[`fixtures-3: Should only match \`outside.js\` and \`dir/inside.js\` (stderr) 1`] = `""`;
-
-exports[`fixtures-3: Should only match \`outside.js\` and \`dir/inside.js\` (stdout) 1`] = `
-"dir/inside.js
-outside.js"
+exports[`fixtures-3: Should not exclude \`.svn\` when specified explicitly (nonexisting)  1`] = `
+{
+  "stderr": "",
+  "stdout": "outside.js",
+  "write": [],
+}
 `;
 
-exports[`fixtures-3: Should only match \`outside.js\` and \`dir/inside.js\` (write) 1`] = `[]`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #2 (stderr) 1`] = `""`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #2 (stdout) 1`] = `"0/level-1.js"`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #2 (write) 1`] = `[]`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #3 (stderr) 1`] = `""`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #3 (stdout) 1`] = `"0/level-1.js"`;
-
-exports[`fixtures-4: Should match \`level-1.js\` #3 (write) 1`] = `[]`;
-
-exports[`fixtures-4: Should match \`level-1.js\` (stderr) 1`] = `""`;
-
-exports[`fixtures-4: Should match \`level-1.js\` (stdout) 1`] = `"0/level-1.js"`;
+exports[`fixtures-3: Should only match \`outside.js\` and \`dir/inside.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "dir/inside.js
+outside.js",
+  "write": [],
+}
+`;
 
-exports[`fixtures-4: Should match \`level-1.js\` (write) 1`] = `[]`;
+exports[`fixtures-4: Should match \`level-1.js\`  1`] = `
+{
+  "stderr": "",
+  "stdout": "0/level-1.js",
+  "write": [],
+}
+`;
 
-exports[`should not ignore file paths contains object prototype keys (stderr) 1`] = `""`;
+exports[`fixtures-4: Should match \`level-1.js\` #2  1`] = `
+{
+  "stderr": "",
+  "stdout": "0/level-1.js",
+  "write": [],
+}
+`;
 
-exports[`should not ignore file paths contains object prototype keys (stdout) 1`] = `"constructor/should-be-formatted.js"`;
+exports[`fixtures-4: Should match \`level-1.js\` #3  1`] = `
+{
+  "stderr": "",
+  "stdout": "0/level-1.js",
+  "write": [],
+}
+`;
 
-exports[`should not ignore file paths contains object prototype keys (write) 1`] = `[]`;
+exports[`should not ignore file paths contains object prototype keys  1`] = `
+{
+  "stderr": "",
+  "stdout": "constructor/should-be-formatted.js",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/patterns.js.snap b/test/__tests__/__snapshots__/patterns.js.snap
index d2bc8ff..cd89e65 100644
--- a/test/__tests__/__snapshots__/patterns.js.snap
+++ b/test/__tests__/__snapshots__/patterns.js.snap
@@ -1,82 +1,73 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`exits with an informative message when there are no patterns provided (stderr) 1`] = `
-"
+exports[`exits with an informative message when there are no patterns provided  1`] = `
+{
+  "stderr": "
   Expected at least one target file/dir/glob
-"
+",
+  "stdout": "",
+  "write": [],
+}
 `;
 
-exports[`exits with an informative message when there are no patterns provided (stdout) 1`] = `""`;
-
-exports[`exits with an informative message when there are no patterns provided (write) 1`] = `[]`;
-
-exports[`multiple patterns (stderr) 1`] = `""`;
-
-exports[`multiple patterns (stdout) 1`] = `
-"directory/file.js
+exports[`multiple patterns  1`] = `
+{
+  "stderr": "",
+  "stdout": "directory/file.js
 directory/nested-directory/nested-directory-file.js
 other-directory/file.js
-other-directory/nested-directory/nested-directory-file.js"
+other-directory/nested-directory/nested-directory-file.js",
+  "write": [],
+}
 `;
 
-exports[`multiple patterns (write) 1`] = `[]`;
-
-exports[`multiple patterns with a negated pattern (stderr) 1`] = `""`;
-
-exports[`multiple patterns with a negated pattern (stdout) 1`] = `
-"directory/file.js
+exports[`multiple patterns with a negated pattern  1`] = `
+{
+  "stderr": "",
+  "stdout": "directory/file.js
 other-directory/file.js
 other-regular-modules.js
-regular-module.js"
-`;
-
-exports[`multiple patterns with a negated pattern (write) 1`] = `[]`;
-
-exports[`multiple patterns with a negated pattern and leading \`./\`, ignores node_modules by default (stderr) 1`] = `""`;
-
-exports[`multiple patterns with a negated pattern and leading \`./\`, ignores node_modules by default (stdout) 1`] = `
-"other-directory/file.js
-other-directory/nested-directory/nested-directory-file.js
-other-regular-modules.js
-regular-module.js"
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`multiple patterns with a negated pattern and leading \`./\`, ignores node_modules by default (write) 1`] = `[]`;
-
-exports[`multiple patterns with a negated pattern, doesn't ignore node_modules with the --with-node-modules flag (stderr) 1`] = `""`;
-
-exports[`multiple patterns with a negated pattern, doesn't ignore node_modules with the --with-node-modules flag (stdout) 1`] = `
-"node_modules/node-module.js
+exports[`multiple patterns with a negated pattern, doesn't ignore node_modules with the --with-node-modules flag  1`] = `
+{
+  "stderr": "",
+  "stdout": "node_modules/node-module.js
 other-directory/file.js
 other-directory/nested-directory/nested-directory-file.js
 other-regular-modules.js
-regular-module.js"
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`multiple patterns with a negated pattern, doesn't ignore node_modules with the --with-node-modules flag (write) 1`] = `[]`;
-
-exports[`multiple patterns with a negated pattern, ignores node_modules by default (stderr) 1`] = `""`;
-
-exports[`multiple patterns with a negated pattern, ignores node_modules by default (stdout) 1`] = `
-"other-directory/file.js
+exports[`multiple patterns with a negated pattern, ignores node_modules by default  1`] = `
+{
+  "stderr": "",
+  "stdout": "other-directory/file.js
 other-directory/nested-directory/nested-directory-file.js
 other-regular-modules.js
-regular-module.js"
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`multiple patterns with a negated pattern, ignores node_modules by default (write) 1`] = `[]`;
-
-exports[`multiple patterns with an extra non-existent pattern (stderr) 1`] = `""`;
-
-exports[`multiple patterns with an extra non-existent pattern (stdout) 1`] = `
-"directory/file.js
-directory/nested-directory/nested-directory-file.js"
+exports[`multiple patterns with an extra non-existent pattern  1`] = `
+{
+  "stderr": "",
+  "stdout": "directory/file.js
+directory/nested-directory/nested-directory-file.js",
+  "write": [],
+}
 `;
 
-exports[`multiple patterns with an extra non-existent pattern (write) 1`] = `[]`;
-
-exports[`multiple patterns, throws an error and exits with a non-zero code when there are no matches (stderr) 1`] = `"[error] No files matching the given patterns were found."`;
-
-exports[`multiple patterns, throws an error and exits with a non-zero code when there are no matches (stdout) 1`] = `""`;
-
-exports[`multiple patterns, throws an error and exits with a non-zero code when there are no matches (write) 1`] = `[]`;
+exports[`multiple patterns, throws an error and exits with a non-zero code when there are no matches  1`] = `
+{
+  "stderr": "[error] No files matching the given patterns were found.",
+  "stdout": "",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/print-code.js.snap b/test/__tests__/__snapshots__/print-code.js.snap
index c5943c8..521f565 100644
--- a/test/__tests__/__snapshots__/print-code.js.snap
+++ b/test/__tests__/__snapshots__/print-code.js.snap
@@ -1,5 +1,13 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Line breaking after filepath with errors (stdout) 1`] = `"foo();"`;
+exports[`Line breaking after filepath with errors  1`] = `
+{
+  "stdout": "foo();",
+}
+`;
 
-exports[`Line breaking after filepath with errors (stdout) 2`] = `"foo();"`;
+exports[`Line breaking after filepath with errors  2`] = `
+{
+  "stdout": "foo();",
+}
+`;
diff --git a/test/__tests__/__snapshots__/skip-folders.js.snap b/test/__tests__/__snapshots__/skip-folders.js.snap
index 9ffde85..b386f80 100644
--- a/test/__tests__/__snapshots__/skip-folders.js.snap
+++ b/test/__tests__/__snapshots__/skip-folders.js.snap
@@ -1,15 +1,17 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`skip folders passed specifically (stdout) 1`] = `
-"a/file.js
-b/file.js"
+exports[`skip folders passed specifically  1`] = `
+{
+  "stdout": "a/file.js
+b/file.js",
+  "write": [],
+}
 `;
 
-exports[`skip folders passed specifically (write) 1`] = `[]`;
-
-exports[`skips folders in glob (stdout) 1`] = `
-"a/file.js
-b/file.js"
+exports[`skips folders in glob  1`] = `
+{
+  "stdout": "a/file.js
+b/file.js",
+  "write": [],
+}
 `;
-
-exports[`skips folders in glob (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/syntax-error.js.snap b/test/__tests__/__snapshots__/syntax-error.js.snap
index 48872f7..b3c3302 100644
--- a/test/__tests__/__snapshots__/syntax-error.js.snap
+++ b/test/__tests__/__snapshots__/syntax-error.js.snap
@@ -1,11 +1,11 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`exits with non-zero code when input has a syntax error (stderr) 1`] = `
-"[error] SyntaxError: Missing semicolon. (1:2)
+exports[`exits with non-zero code when input has a syntax error  1`] = `
+{
+  "stderr": "[error] SyntaxError: Missing semicolon. (1:2)
 [error] > 1 | a.2
-[error]     |  ^"
+[error]     |  ^",
+  "stdout": "",
+  "write": [],
+}
 `;
-
-exports[`exits with non-zero code when input has a syntax error (stdout) 1`] = `""`;
-
-exports[`exits with non-zero code when input has a syntax error (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/with-node-modules.js.snap b/test/__tests__/__snapshots__/with-node-modules.js.snap
index 851de77..ca57eb0 100644
--- a/test/__tests__/__snapshots__/with-node-modules.js.snap
+++ b/test/__tests__/__snapshots__/with-node-modules.js.snap
@@ -1,41 +1,41 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`does not ignore node_modules for manual file list (stderr) 1`] = `""`;
-
-exports[`does not ignore node_modules for manual file list (stdout) 1`] = `
-"nested/node_modules/node-module.js
+exports[`does not ignore node_modules for manual file list  1`] = `
+{
+  "stderr": "",
+  "stdout": "nested/node_modules/node-module.js
 node_modules/node-module.js
 not_node_modules/file.js
-regular-module.js"
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`does not ignore node_modules for manual file list (write) 1`] = `[]`;
-
-exports[`doesn't ignore node_modules with --with-node-modules flag (stderr) 1`] = `""`;
-
-exports[`doesn't ignore node_modules with --with-node-modules flag (stdout) 1`] = `
-"nested/node_modules/node-module.js
+exports[`doesn't ignore node_modules with --with-node-modules flag  1`] = `
+{
+  "stderr": "",
+  "stdout": "nested/node_modules/node-module.js
 node_modules/node-module.js
 not_node_modules/file.js
-regular-module.js"
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`doesn't ignore node_modules with --with-node-modules flag (write) 1`] = `[]`;
-
-exports[`ignores node_modules by default (stderr) 1`] = `""`;
-
-exports[`ignores node_modules by default (stdout) 1`] = `
-"not_node_modules/file.js
-regular-module.js"
+exports[`ignores node_modules by default  1`] = `
+{
+  "stderr": "",
+  "stdout": "not_node_modules/file.js
+regular-module.js",
+  "write": [],
+}
 `;
 
-exports[`ignores node_modules by default (write) 1`] = `[]`;
-
-exports[`ignores node_modules by with ./**/*.js (stderr) 1`] = `""`;
-
-exports[`ignores node_modules by with ./**/*.js (stdout) 1`] = `
-"not_node_modules/file.js
-regular-module.js"
+exports[`ignores node_modules by with ./**/*.js  1`] = `
+{
+  "stderr": "",
+  "stdout": "not_node_modules/file.js
+regular-module.js",
+  "write": [],
+}
 `;
-
-exports[`ignores node_modules by with ./**/*.js (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/with-parser-inference.js.snap b/test/__tests__/__snapshots__/with-parser-inference.js.snap
index 5381c1f..14a07ef 100644
--- a/test/__tests__/__snapshots__/with-parser-inference.js.snap
+++ b/test/__tests__/__snapshots__/with-parser-inference.js.snap
@@ -1,53 +1,79 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`infers parser from filename (.prettierrc) (stdout) 1`] = `"{}"`;
+exports[`infers parser from filename (.prettierrc)  1`] = `
+{
+  "stdout": "{}",
+}
+`;
 
-exports[`infers parser from filename (.stylelintrc YAML) (stdout) 1`] = `"extends: """`;
+exports[`infers parser from filename (.stylelintrc YAML)  1`] = `
+{
+  "stdout": "extends: """,
+}
+`;
 
-exports[`infers parser from filename (.stylelintrc) (stdout) 1`] = `"{}"`;
+exports[`infers parser from filename (.stylelintrc)  1`] = `
+{
+  "stdout": "{}",
+}
+`;
 
-exports[`infers parser from filename (jakefile) (stdout) 1`] = `"let foo = (x = 1) => x;"`;
+exports[`infers parser from filename (jakefile)  1`] = `
+{
+  "stdout": "let foo = (x = 1) => x;",
+}
+`;
 
-exports[`infers parser from filename (lintstagedrc YAML) (stdout) 1`] = `
-""*":
-  - your-cmd"
+exports[`infers parser from filename (lintstagedrc YAML)  1`] = `
+{
+  "stdout": ""*":
+  - your-cmd",
+}
 `;
 
-exports[`infers parser from filename (lintstagedrc) (stdout) 1`] = `"{ "*": "your-cmd" }"`;
+exports[`infers parser from filename (lintstagedrc)  1`] = `
+{
+  "stdout": "{ "*": "your-cmd" }",
+}
+`;
 
-exports[`infers parser from filename (swcrc) (stdout) 1`] = `
-"{
+exports[`infers parser from filename (swcrc)  1`] = `
+{
+  "stdout": "{
   "jsc": {
     // Requires v1.2.50 or upper and requires target to be es2016 or upper.
     "keepClassNames": false
   }
-}"
+}",
+}
 `;
 
-exports[`infers postcss parser (stderr) 1`] = `""`;
-
-exports[`infers postcss parser (stdout) 1`] = `
-"/* JavaScript */
+exports[`infers postcss parser  1`] = `
+{
+  "stderr": "",
+  "stdout": "/* JavaScript */
 "use strict";
 /* Stylesheet */
 * {
   outline: none;
-}"
+}",
+  "write": [],
+}
 `;
 
-exports[`infers postcss parser (write) 1`] = `[]`;
-
-exports[`infers postcss parser with --check (stderr) 1`] = `""`;
-
-exports[`infers postcss parser with --check (stdout) 1`] = `
-"Checking formatting...
-All matched files use Prettier code style!"
+exports[`infers postcss parser with --check  1`] = `
+{
+  "stderr": "",
+  "stdout": "Checking formatting...
+All matched files use Prettier code style!",
+  "write": [],
+}
 `;
 
-exports[`infers postcss parser with --check (write) 1`] = `[]`;
-
-exports[`infers postcss parser with --list-different (stderr) 1`] = `""`;
-
-exports[`infers postcss parser with --list-different (stdout) 1`] = `""`;
-
-exports[`infers postcss parser with --list-different (write) 1`] = `[]`;
+exports[`infers postcss parser with --list-different  1`] = `
+{
+  "stderr": "",
+  "stdout": "",
+  "write": [],
+}
+`;
diff --git a/test/__tests__/__snapshots__/with-shebang.js.snap b/test/__tests__/__snapshots__/with-shebang.js.snap
index cd5382c..4f57f17 100644
--- a/test/__tests__/__snapshots__/with-shebang.js.snap
+++ b/test/__tests__/__snapshots__/with-shebang.js.snap
@@ -1,10 +1,10 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`preserves shebang (stderr) 1`] = `""`;
-
-exports[`preserves shebang (stdout) 1`] = `
-"#!/usr/bin/env node
-"use strict";"
+exports[`preserves shebang  1`] = `
+{
+  "stderr": "",
+  "stdout": "#!/usr/bin/env node
+"use strict";",
+  "write": [],
+}
 `;
-
-exports[`preserves shebang (write) 1`] = `[]`;
diff --git a/test/__tests__/__snapshots__/write.js.snap b/test/__tests__/__snapshots__/write.js.snap
deleted file mode 100644
index 15a6f0c..0000000
--- a/test/__tests__/__snapshots__/write.js.snap
+++ /dev/null
@@ -1,41 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`do not write file with --write + formatted file (stderr) 1`] = `""`;
-
-exports[`do not write file with --write + formatted file (stdout) 1`] = `"formatted.js 0ms (unchanged)"`;
-
-exports[`do not write file with --write + invalid file (stderr) 1`] = `
-"[error] invalid.js: SyntaxError: Unexpected token (1:17)
-[error] > 1 | this is invalid!
-[error]     |                 ^"
-`;
-
-exports[`do not write file with --write + invalid file (stdout) 1`] = `""`;
-
-exports[`write file with --write + unformatted file (stderr) 1`] = `""`;
-
-exports[`write file with --write + unformatted file (stdout) 1`] = `"unformatted.js 0ms"`;
-
-exports[`write file with --write + unformatted file (write) 1`] = `
-[
-  {
-    "content": "var x = 1;
-",
-    "filename": "unformatted.js",
-  },
-]
-`;
-
-exports[`write file with -w + unformatted file (stderr) 1`] = `""`;
-
-exports[`write file with -w + unformatted file (stdout) 1`] = `"unformatted.js 0ms"`;
-
-exports[`write file with -w + unformatted file (write) 1`] = `
-[
-  {
-    "content": "var x = 1;
-",
-    "filename": "unformatted.js",
-  },
-]
-`;
diff --git a/test/utils.js b/test/utils.js
index 10dd8cc..9d81509 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -134,24 +134,33 @@ async function runCommand(dir, args, options) {
   return { cwd, status, stdout, stderr, write };
 }
 
-async function runTest(name, expected, getResult, options) {
+async function runTest(tests, getResult, options) {
   const title = options.title || "";
-  test(`${title}(${name})`, async () => {
+  test(title, async () => {
     let result = await getResult();
-    let value = result[name];
-    if (expected !== undefined) {
-      if (name === "status" && expected === "non-zero") {
-        expect(value).not.toBe(0);
-      } else if (typeof expected === "function") {
-        expected(value);
-      } else {
-        if (typeof value === "string") {
-          value = value.replaceAll(result.cwd, "$CWD");
+    let snapshot;
+    for (const name of ["status", "stdout", "stderr", "write"]) {
+      let value = result[name];
+      const expected = tests[name];
+      if (expected !== undefined) {
+        if (name === "status" && expected === "non-zero") {
+          expect(value).not.toBe(0);
+        } else if (typeof expected === "function") {
+          expected(value);
+        } else {
+          if (typeof value === "string") {
+            value = value.replaceAll(result.cwd, "$CWD");
+          }
+          expect(value).toEqual(expected);
         }
-        expect(value).toEqual(expected);
+      } else {
+        snapshot ??= {};
+        snapshot[name] = value;
       }
-    } else {
-      expect(value).toMatchSnapshot();
+    }
+
+    if (snapshot) {
+      expect(snapshot).toMatchSnapshot();
     }
   });
 }
@@ -173,13 +182,7 @@ function runCli(dir, args = [], options = {}) {
     get write() {
       return getResult().then((result) => result.write);
     },
-    test: (tests) => {
-      for (const name of ["status", "stdout", "stderr", "write"]) {
-        const expected = tests[name];
-        runTest(name, expected, getResult, options);
-      }
-      return result;
-    },
+    test: (tests) => runTest(tests, getResult, options),
     then: (onFulfilled, onRejected) => {
       return getResult().then(onFulfilled, onRejected);
     },