diff --git a/eng/CredScanSuppression.json b/eng/CredScanSuppression.json
new file mode 100644
index 000000000..106f9fda5
--- /dev/null
+++ b/eng/CredScanSuppression.json
@@ -0,0 +1,11 @@
+{
+    "tool": "Credential Scanner",
+    "suppressions": [
+        {
+            "file":[
+                "eng/common/testproxy/dotnet-devcert.pfx"
+            ],
+            "_justification": "File contains private key used by test code."
+        }
+    ]
+}