diff --git a/circle.yml b/circle.yml
index a755e9f..cc03c24 100644
--- a/circle.yml
+++ b/circle.yml
@@ -14,4 +14,4 @@ test:
     - pyenv versions
     - pyenv global 2.7.10 3.3.3 3.4.3 3.5.0 pypy-2.5.0
   override:
-    - tox -- --junitxml=$CIRCLE_TEST_REPORTS/$envname/test_result.xml
+    - tox -- --junitxml=$CIRCLE_TEST_REPORTS/{envname}/test_result.xml