diff --git a/.travis.yml b/.travis.yml
index be79fc2..41ef5cf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,5 +22,5 @@ install:
 script:
   # a workaround for go test not supporting coverage for multiple packages in a single invocation
   - |-
-    echo 'mode: count' > coverage.merged && go list ./... | xargs -n1 -I{} sh -c 'go test -covermode=count -coverprofile=coverage.tmp -test.run="BCD|Parse" {} && tail -n +2 coverage.tmp >> coverage.merged' && rm coverage.tmp
+    echo 'mode: count' > coverage.merged && go list ./... | xargs -n1 -I{} sh -c ': > coverage.tmp; go test -covermode=count -coverprofile=coverage.tmp -test.run="BCD|Parse" {} && tail -n +2 coverage.tmp >> coverage.merged' && rm coverage.tmp
   - $HOME/gopath/bin/goveralls -coverprofile=coverage.merged -service=travis-ci -repotoken $COVERALLS_TOKEN