diff --git a/wolfcrypt/test/test_paths.h.in b/wolfcrypt/test/test_paths.h.in
index 517826434..ce5ade920 100644
--- a/wolfcrypt/test/test_paths.h.in
+++ b/wolfcrypt/test/test_paths.h.in
@@ -20,6 +20,15 @@
  */
 
 #ifndef NO_FILESYSTEM
+#ifdef CERT_REL_PREFIX
+    #define CERT_PREFIX CERT_REL_PREFIX
+    #ifndef NO_WRITE_TEMP_FILES
+        #ifndef CERT_WRITE_TEMP_DIR
+            #define CERT_WRITE_TEMP_DIR "./"
+        #endif
+    #endif
+#else
     #define CERT_PREFIX "@abs_top_srcdir@/"
     #define CERT_WRITE_TEMP_DIR "@abs_top_builddir@/"
+#endif /* CERT_REL_PREFIX */
 #endif /* NO_FILESYSTEM */