Use the correct pip
diff --git a/.travis.yml b/.travis.yml
index 90631ed..5c4f93f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -105,7 +105,7 @@
     ~/.venv/bin/tox
 
 before_install:
-  - pip install codecov
+  - ~/.venv/bin/pip install codecov
 
 after_script:
   - ~/.venv/bin/codecov