diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index b29c6f3..8e1f412 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -402,11 +402,11 @@
   }
 }
 
-TEST(unistd, getpid_caching_and_fork) {
+static void TestGetPidCachingWithFork(int (*fork_fn)()) {
   pid_t parent_pid = getpid();
   ASSERT_EQ(syscall(__NR_getpid), parent_pid);
 
-  pid_t fork_result = fork();
+  pid_t fork_result = fork_fn();
   ASSERT_NE(fork_result, -1);
   if (fork_result == 0) {
     // We're the child.
@@ -424,6 +424,14 @@
   }
 }
 
+TEST(unistd, getpid_caching_and_fork) {
+  TestGetPidCachingWithFork(fork);
+}
+
+TEST(unistd, getpid_caching_and_vfork) {
+  TestGetPidCachingWithFork(vfork);
+}
+
 static int GetPidCachingCloneStartRoutine(void*) {
   AssertGetPidCorrect();
   return 123;