diff --git a/.config/CredScanSuppressions.json b/.config/CredScanSuppressions.json
index 534d18500bc517b924104a4b9265c7e3d84cc0d0..6d728376700900bf6a24e9e3af1170a300073743 100644
--- a/.config/CredScanSuppressions.json
+++ b/.config/CredScanSuppressions.json
@@ -14,6 +14,12 @@
                 "-----BEGIN PRIVATE KEY-----",
                 "-----BEGIN * PRIVATE KEY-----"
             ]
+        },
+        {
+            "_justification": "Suppression approved. Private key for testing purpose.",
+            "file": [
+                "src/tests/FunctionalTests/Android/Device_Emulator/gRPC/grpc-dotnet/testassets/Certs/InteropTests/server1.pfx"
+            ]
         }
     ]
 }