1 files changed, 8 insertions, 3 deletions
diff --git a/tools/fmt_test.py b/tools/fmt_test.py
index d4aca75aa..dd704485d 100755
--- a/tools/fmt_test.py
+++ b/tools/fmt_test.py
@@ -4,6 +4,7 @@ import os
 import sys
 from util import mkdtemp, root_path, tests_path, run, green_ok
 import shutil
+import json
 
 
 def fmt_test(deno_exe):
@@ -18,13 +19,17 @@ def fmt_test(deno_exe):
         # Set DENO_DIR to //js/ so we don't have to rely on an intenet
         # connection to download https://deno.land/std/prettier/main.ts
         deno_dir = os.path.join(root_path, "js")
-        run([deno_exe, dst, "--fmt", "--allow-read"],
-            merge_env={"DENO_DIR": deno_dir})
+        run([deno_exe, dst, "--fmt"], merge_env={"DENO_DIR": deno_dir})
         with open(fixed_filename) as f:
             expected = f.read()
         with open(dst) as f:
             actual = f.read()
-        assert expected == actual
+        if expected != actual:
+            print "Expected didn't match actual."
+            print "expected: ", json.dumps(expected)
+            print "actual: ", json.dumps(actual)
+            sys.exit(1)
+
     finally:
         shutil.rmtree(d)
     print green_ok()