diff --git a/src/dotenv/main.py b/src/dotenv/main.py
index 491634d9..c33148cb 100644
--- a/src/dotenv/main.py
+++ b/src/dotenv/main.py
@@ -375,7 +375,7 @@ def _is_debugger():
             return check_path
 
     if raise_error_if_not_found:
-        raise IOError("File not found")
+        raise FileNotFoundError("File not found")
 
     return ""
 
diff --git a/tests/test_main.py b/tests/test_main.py
index 50703af0..7f2d23cd 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -346,7 +346,7 @@ def test_find_dotenv_no_file_raise(tmp_path):
     leaf = prepare_file_hierarchy(tmp_path)
     os.chdir(leaf)
 
-    with pytest.raises(IOError):
+    with pytest.raises(FileNotFoundError):
         dotenv.find_dotenv(raise_error_if_not_found=True, usecwd=True)