diff --git a/test/util/BUILD b/test/util/BUILD
index 1b028a477..e561f3daa 100644
--- a/test/util/BUILD
+++ b/test/util/BUILD
@@ -172,6 +172,7 @@ cc_library(
         ":posix_error",
         ":save_util",
         ":test_util",
+        gtest,
         "@com_google_absl//absl/strings",
     ],
 )
diff --git a/test/util/multiprocess_util.cc b/test/util/multiprocess_util.cc
index 8b676751b..a6b0de24b 100644
--- a/test/util/multiprocess_util.cc
+++ b/test/util/multiprocess_util.cc
@@ -154,6 +154,9 @@ PosixErrorOr<int> InForkedProcess(const std::function<void()>& fn) {
   pid_t pid = fork();
   if (pid == 0) {
     fn();
+    TEST_CHECK_MSG(!::testing::Test::HasFailure(),
+                   "EXPECT*/ASSERT* failed. These are not async-signal-safe "
+                   "and must not be called from fn.");
     _exit(0);
   }
   MaybeSave();