diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 841641f1d..fae28a6eb 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -397,7 +397,7 @@ static void TestFsyncFunction(int (*fn)(int)) {
   close(fd);
 
   // The fd can even be a directory.
-  ASSERT_NE(-1, fd = open("/", O_RDONLY));
+  ASSERT_NE(-1, fd = open("/data", O_RDONLY));
   EXPECT_EQ(0, fn(fd));
   close(fd);