diff --git a/tfstate/remote_s3_test.go b/tfstate/remote_s3_test.go
index a96d17c..f9b8721 100644
--- a/tfstate/remote_s3_test.go
+++ b/tfstate/remote_s3_test.go
@@ -21,6 +21,8 @@ var testBuckets = []struct {
 }
 
 func TestBucketRegion(t *testing.T) {
+	t.Setenv("AWS_ACCESS_KEY_ID", "DUMMY") // s3/manager.GetBucketRegion requires credentials
+	t.Setenv("AWS_SECRET_ACCESS_KEY", "DUMMY")
 	for _, b := range testBuckets {
 		region, err := tfstate.GetBucketRegion(b.bucket)
 		if err != nil {