remove 'exec' from 'script' attribute
diff --git a/.travis.yml b/.travis.yml
index 86b95c1..42c095d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,6 @@
   - go get github.com/pierrre/gotestcover
   - if ! go get github.com/golang/tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
 script:
-  - exec $HOME/gopath/bin/gotestcover -v -tags=fixtures -coverprofile=cover.out ./...
+  - $HOME/gopath/bin/gotestcover -v -tags=fixtures -coverprofile=cover.out ./...
 after_success:
   - $HOME/gopath/bin/goveralls -service=travis-ci -coverprofile=cover.out