diff --git a/internal/internal_test.go b/internal/internal_test.go
index 56ff611e..bfdcbbbe 100644
--- a/internal/internal_test.go
+++ b/internal/internal_test.go
@@ -10,7 +10,7 @@ import (
 func TestRetryBackoff(t *testing.T) {
 	RegisterTestingT(t)
 
-	for i := -1; i <= 16; i++ {
+	for i := 0; i <= 16; i++ {
 		backoff := RetryBackoff(i, time.Millisecond, 512*time.Millisecond)
 		Expect(backoff >= 0).To(BeTrue())
 		Expect(backoff <= 512*time.Millisecond).To(BeTrue())