diff --git a/.travis.yml b/.travis.yml
index 28e0022..abb4a98 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ matrix:
 install: true
 
 script:
-  - go mod tidy
+  - go mod vendor
   - diff -u <(echo -n) <(gofmt -d .)
   - go test -v -mod=vendor ./...