diff --git a/libcxx/test/support/platform_support.h b/libcxx/test/support/platform_support.h
--- a/libcxx/test/support/platform_support.h
+++ b/libcxx/test/support/platform_support.h
@@ -75,16 +75,12 @@
         abort();
     }
 #else
-    std::string Name;
-    int FD = -1;
-    do {
-        Name = "libcxx.XXXXXX";
-        FD = mkstemp(&Name[0]);
-        if (FD == -1 && errno == EINVAL) {
-            perror("mkstemp");
-            abort();
-        }
-    } while (FD == -1);
+    std::string Name = "libcxx.XXXXXX";
+    int FD = mkstemp(&Name[0]);
+    if (FD == -1) {
+        perror("mkstemp");
+        abort();
+    }
     close(FD);
     return Name;
 #endif