diff --git a/tests/utils.h b/tests/utils.h
index 410b427..a5783af 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -18,6 +18,7 @@
 #define __TEST_UTILS_H
 
 #include <dlfcn.h>
+#include <fcntl.h>
 #include <inttypes.h>
 #include <sys/mman.h>
 #include <sys/types.h>
@@ -151,6 +152,12 @@
   }
 }
 
+static inline void AssertCloseOnExec(int fd, bool close_on_exec) {
+  int flags = fcntl(fd, F_GETFD);
+  ASSERT_NE(flags, -1);
+  ASSERT_EQ(close_on_exec ? FD_CLOEXEC : 0, flags & FD_CLOEXEC);
+}
+
 // The absolute path to the executable
 const std::string& get_executable_path();