diff --git a/adapter/adapter.go b/adapter/adapter.go
index d2c362bc..32fd2b77 100644
--- a/adapter/adapter.go
+++ b/adapter/adapter.go
@@ -287,7 +287,7 @@ func (p *Proxy) URLTest(ctx context.Context, url string, expectedStatus utils.In
 		}
 	}
 
-	if !expectedStatus.Check(uint16(resp.StatusCode)) {
+	if expectedStatus != nil && !expectedStatus.Check(uint16(resp.StatusCode)) {
 		// maybe another value should be returned for differentiation
 		err = errors.New("response status is inconsistent with the expected status")
 	}
diff --git a/common/utils/ranges.go b/common/utils/ranges.go
index a6293f65..705bbdee 100644
--- a/common/utils/ranges.go
+++ b/common/utils/ranges.go
@@ -63,7 +63,7 @@ func NewIntRangesFromList[T constraints.Integer](list []string) (IntRanges[T], e
 }
 
 func (ranges IntRanges[T]) Check(status T) bool {
-	if ranges == nil || len(ranges) == 0 {
+	if len(ranges) == 0 {
 		return true
 	}