diff --git a/mypyc/test/test_run.py b/mypyc/test/test_run.py
index df9d44eab73fa..f5c902bf3b3d2 100644
--- a/mypyc/test/test_run.py
+++ b/mypyc/test/test_run.py
@@ -172,12 +172,10 @@ def run_case_inner(self, testcase: DataDrivenTestCase) -> None:
             # new by distutils, shift the mtime of all of the
             # generated artifacts back by a second.
             fudge_dir_mtimes(WORKDIR, -1)
-            # On Ubuntu, changing the mtime doesn't work reliably. As
+            # On some OS, changing the mtime doesn't work reliably. As
             # a workaround, sleep.
-            #
             # TODO: Figure out a better approach, since this slows down tests.
-            if sys.platform == "linux":
-                time.sleep(1.0)
+            time.sleep(1.0)
 
             step += 1
             with chdir_manager(".."):