diff --git a/pkgs/applications/audio/zynaddsubfx/default.nix b/pkgs/applications/audio/zynaddsubfx/default.nix
index 60447f360fb..101d4dc9379 100644
--- a/pkgs/applications/audio/zynaddsubfx/default.nix
+++ b/pkgs/applications/audio/zynaddsubfx/default.nix
@@ -93,11 +93,13 @@ in stdenv.mkDerivation rec {
 
   # TODO: Update cmake hook to make it simpler to selectively disable cmake tests: #113829
   checkPhase = let
-    # Tests fail on aarch64
-    disabledTests = lib.optionals stdenv.isAarch64 [
-      "MessageTest"
-      "UnisonTest"
-    ];
+    disabledTests =
+      # PortChecker test fails when lashSupport is enabled because
+      # zynaddsubfx takes to long to start trying to connect to lash
+      lib.optionals lashSupport [ "PortChecker" ]
+
+      # Tests fail on aarch64
+      ++ lib.optionals stdenv.isAarch64 [ "MessageTest" "UnisonTest" ];
   in ''
     runHook preCheck
     ctest --output-on-failure -E '^${lib.concatStringsSep "|" disabledTests}$'