Travis: Do not update coverage

diff --git a/.travis.yml b/.travis.yml
index 2c1ee4fe91c31b1292f2ee727d0818d49a91f2af..7dd83922d3621500a276a683d91b1a6cb7f912ee 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ install:
 
 # command to run tests
 before_script:
-- pip install -U coverage
+- pip install coverage
 - pip install coveralls
 
 script: