diff --git a/sdk/core/azure-core/test/ut/proxy_tests/localproxy.passwd/Dockerfile b/sdk/core/azure-core/test/ut/proxy_tests/localproxy.passwd/Dockerfile
index a96601dd9..5b1a57701 100644
--- a/sdk/core/azure-core/test/ut/proxy_tests/localproxy.passwd/Dockerfile
+++ b/sdk/core/azure-core/test/ut/proxy_tests/localproxy.passwd/Dockerfile
@@ -2,6 +2,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
+# DisableDockerDetector "This was used for testing in the past. If such testing can be supported in the future this container will be used again."
 FROM ubuntu/squid
 LABEL maintainer "Larry Osterman<github.com/LarryOsterman>"
 
diff --git a/sdk/core/azure-core/test/ut/proxy_tests/localproxy/Dockerfile b/sdk/core/azure-core/test/ut/proxy_tests/localproxy/Dockerfile
index 28d4dadce..ac2958893 100644
--- a/sdk/core/azure-core/test/ut/proxy_tests/localproxy/Dockerfile
+++ b/sdk/core/azure-core/test/ut/proxy_tests/localproxy/Dockerfile
@@ -2,6 +2,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
+# DisableDockerDetector "This was used for testing in the past. If such testing can be supported in the future this container will be used again."
 FROM ubuntu/squid
 LABEL maintainer "Larry Osterman<github.com/LarryOsterman>"
 
diff --git a/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy.passwd/Dockerfile b/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy.passwd/Dockerfile
index 4736fc332..0089cdfab 100644
--- a/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy.passwd/Dockerfile
+++ b/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy.passwd/Dockerfile
@@ -2,6 +2,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
+# DisableDockerDetector "This was used for testing in the past. If such testing can be supported in the future this container will be used again."
 FROM ubuntu/squid
 LABEL maintainer "Larry Osterman<github.com/LarryOsterman>"
 
diff --git a/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy/Dockerfile b/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy/Dockerfile
index 28d4dadce..ac2958893 100644
--- a/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy/Dockerfile
+++ b/sdk/core/azure-core/test/ut/proxy_tests/remoteproxy/Dockerfile
@@ -2,6 +2,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
+# DisableDockerDetector "This was used for testing in the past. If such testing can be supported in the future this container will be used again."
 FROM ubuntu/squid
 LABEL maintainer "Larry Osterman<github.com/LarryOsterman>"