diff --git a/run_tests.sh b/run_tests.sh
index 7cb0ca9a0b..133b84515e 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -74,6 +74,9 @@ if [ $no_site_packages -eq 1 ]; then
 fi
 
 function run_tests {
+  # Cleanup *pyc
+  echo "cleaning *.pyc files"
+  ${wrapper} find . -type f -name "*.pyc" -delete
   # Just run the test suites in current environment
   ${wrapper} $NOSETESTS 2> run_tests.log
   # If we get some short import error right away, print the error log directly