diff --git a/tests/pty_test.cpp b/tests/pty_test.cpp
index d5d8994..6e3d2c7 100644
--- a/tests/pty_test.cpp
+++ b/tests/pty_test.cpp
@@ -103,6 +103,8 @@
   arg->finished = true;
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wcast-function-type-mismatch"
 TEST(pty, bug_28979140) {
   // This test is to test a kernel bug, which uses a lock free ring-buffer to
   // pass data through a raw pty, but missing necessary memory barriers.
@@ -164,3 +166,4 @@
   ASSERT_TRUE(arg.matched);
   close(pty);
 }
+#pragma clang diagnostic pop
\ No newline at end of file