diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1aa2428..c2234dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,15 @@
 
+## 5.2.1
+
+*   Handle `splitmix >= 0.1.3.2` no longer having a `testu01` test suite.
+    Starting in splitmix-0.1.3.2, the testu01 test suite was removed and moved
+    to a separate package.
+    [#72](https://github.com/cdepillabout/stacklock2nix/pull/72)
+
+*   Add `dontCheck` for `integer-logarithms`. The test suite requires a version
+    of QuickCheck that is not in Stackage LTS-24.
+    [#72](https://github.com/cdepillabout/stacklock2nix/pull/72)
+
 ## 5.2.0
 
 *   Adds `all-cabal-nixes` argument to stacklock2nix.  This gives an
diff --git a/nix/build-support/stacklock2nix/cabal2nixArgsForPkg.nix b/nix/build-support/stacklock2nix/cabal2nixArgsForPkg.nix
index f1f39ac..48ce1f3 100644
--- a/nix/build-support/stacklock2nix/cabal2nixArgsForPkg.nix
+++ b/nix/build-support/stacklock2nix/cabal2nixArgsForPkg.nix
@@ -117,7 +117,12 @@ cabal2nixArgsOverrides {
     #
     # However, testu01 is only used on Linux, so we don't need to do anything
     # if this is not Linux.
-    if pkgs.lib.versionAtLeast ver "0.1.0.4" then
+    #
+    # Starting in splitmix-0.1.3.2, the testu01 test suite was removed (moved
+    # to a separate package), so we no longer need to pass testu01 at all.
+    if pkgs.lib.versionAtLeast ver "0.1.3.2" then
+      {}
+    else if pkgs.lib.versionAtLeast ver "0.1.0.4" then
       if pkgs.stdenv.isLinux then
         { testu01 = null; }
       else
diff --git a/nix/build-support/stacklock2nix/suggestedOverlay.nix b/nix/build-support/stacklock2nix/suggestedOverlay.nix
index c96fa30..5705670 100644
--- a/nix/build-support/stacklock2nix/suggestedOverlay.nix
+++ b/nix/build-support/stacklock2nix/suggestedOverlay.nix
@@ -177,6 +177,9 @@ hfinal: hprev: with haskell.lib.compose; {
 
   HUnit = dontCheck hprev.HUnit;
 
+  # Tests have a dependency on a QuickCheck version that is not in Stackage.
+  integer-logarithms = dontCheck hprev.integer-logarithms;
+
   # Tests try to access internet.
   js-jquery = dontCheck hprev.js-jquery;