diff --git a/tools/test-proxy/Azure.Sdk.Tools.TestProxy/Common/SanitizerDictionary.cs b/tools/test-proxy/Azure.Sdk.Tools.TestProxy/Common/SanitizerDictionary.cs
index 80c31588c16..e4c99cf41ff 100644
--- a/tools/test-proxy/Azure.Sdk.Tools.TestProxy/Common/SanitizerDictionary.cs
+++ b/tools/test-proxy/Azure.Sdk.Tools.TestProxy/Common/SanitizerDictionary.cs
@@ -396,7 +396,7 @@ public SanitizerDictionary() {
                     "AZSDK3428"
                 ),
                 new RegisteredSanitizer(
-                    new BodyKeySanitizer("$..sasUri"),
+                    new BodyKeySanitizer("$..sasUri", regex: "sig=(?<sig>[^&]+)", groupForReplace: "sig"),
                     "AZSDK3429"
                 ),
                 new RegisteredSanitizer(