diff --git a/internal/tempproxy/client.go b/internal/tempproxy/client.go
index b5ac220..5a17e02 100644
--- a/internal/tempproxy/client.go
+++ b/internal/tempproxy/client.go
@@ -213,7 +213,6 @@ func classifyError(err error, respError string) *ProxyError {
 
 // contains checks if any of the substrings are in the main string (case-insensitive)
 func contains(s string, substrs ...string) bool {
-	s = fmt.Sprintf("%v", s)
 	for _, substr := range substrs {
 		if len(s) >= len(substr) {
 			for i := 0; i <= len(s)-len(substr); i++ {