diff --git a/README.md b/README.md
index 2d17a4f..4324d7b 100644
--- a/README.md
+++ b/README.md
@@ -122,7 +122,7 @@ $ go get -u github.com/tcnksm/ghr
 2. Create a feature branch
 3. Commit your changes
 4. Rebase your local changes against the master branch
-5. Run test suite with the `make test` command and confirm that it passes
+5. Run test suite with the `make test` command and confirm that it passes using correct variables e.g. `GITHUB_TOKEN=$GITHUB_TOKEN TEST_REPO_OWNER=tcnksm TEST_REPO_NAME=ghr make test`
 6. Run `gofmt -s -w .`
 7. Create new Pull Request
 
diff --git a/github_test.go b/github_test.go
index 55b3fa3..9ff8e79 100644
--- a/github_test.go
+++ b/github_test.go
@@ -26,13 +26,11 @@ var (
 )
 
 func TestMain(m *testing.M) {
-	owner := os.Getenv(EnvRepoOwner)
-	if owner != "" {
+	if owner := os.Getenv(EnvRepoOwner); owner != "" {
 		TestOwner = owner
 	}
 
-	repo := os.Getenv(EnvRepoName)
-	if repo != "" {
+	if repo := os.Getenv(EnvRepoName); repo != "" {
 		TestRepo = repo
 	}