diff --git a/ruby/travis-test.sh b/ruby/travis-test.sh
index d30226570..930165e61 100755
--- a/ruby/travis-test.sh
+++ b/ruby/travis-test.sh
@@ -10,12 +10,14 @@ test_version() {
     bash --login -c \
       "rvm install $version && rvm use $version && rvm get head && \
        which ruby && \
+       git clean -f && \
        gem install bundler && bundle && \
        rake test"
   else
     bash --login -c \
       "rvm install $version && rvm use $version && \
        which ruby && \
+       git clean -f && \
        gem install bundler && bundle && \
        rake test &&
        cd ../conformance && make test_ruby"