diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 4c1daa881d8..285b5f03250 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -962,8 +962,10 @@ class RubyLanguage(object):
             "src/ruby/end2end/call_credentials_timeout_test.rb",
             "src/ruby/end2end/call_credentials_returning_bad_metadata_doesnt_kill_background_thread_test.rb",
         ]:
-            if platform_string() == "mac" and test in [
-                # skip fork tests on mac, it's only supported on linux
+            if test in [
+                # TODO(apolcyn): Unskip fork tests on linux. They are
+                # skipped everywhere for now because they're flaky since
+                # introduction.
                 "src/ruby/end2end/fork_test.rb",
                 "src/ruby/end2end/simple_fork_test.rb",
                 "src/ruby/end2end/secure_fork_test.rb",