diff --git a/src/libraries/System.Data.Odbc/src/DatabaseSetupInstructions.md b/src/libraries/System.Data.Odbc/src/DatabaseSetupInstructions.md
index 4c3b16f43fc53..25bcc7225760b 100644
--- a/src/libraries/System.Data.Odbc/src/DatabaseSetupInstructions.md
+++ b/src/libraries/System.Data.Odbc/src/DatabaseSetupInstructions.md
@@ -17,8 +17,8 @@
 - followed [dockerfile](https://github.com/dotnet/dotnet-buildtools-prereqs-docker/blob/master/src/debian/8.2/Dockerfile) instructions for debian 8.2
 - dependencies: libkrb5-dev, cmake
 
-Get the tag name from https://hub.docker.com/r/microsoft/dotnet-buildtools-prereqs/tags/ and use in docker run below
-- `docker run -it microsoft/dotnet-buildtools-prereqs:debian-8.2-SHA-YMD.. /bin/sh`
+Get the tag name from https://mcr.microsoft.com/v2/dotnet-buildtools/prereqs/tags/list and use in docker run below
+- `docker run -it mcr.microsoft.com/dotnet-buildtools/prereqs:debian-8.2-SHA-YMD.. /bin/sh`
 - `docker images` shows _id for Debian 8.2 to use in command below
 - `docker exec -it _id /bin/sh`
 
diff --git a/src/tests/Common/scripts/arm32_ci_script.sh b/src/tests/Common/scripts/arm32_ci_script.sh
index 8866d49536df8..33d884f4f990d 100755
--- a/src/tests/Common/scripts/arm32_ci_script.sh
+++ b/src/tests/Common/scripts/arm32_ci_script.sh
@@ -246,13 +246,13 @@ function cross_build_coreclr_with_docker {
         # TODO: For arm, we are going to embed RootFS inside Docker image.
         case $__linuxCodeName in
         trusty)
-            __dockerImage=" microsoft/dotnet-buildtools-prereqs:ubuntu-14.04-cross-0cd4667-20172211042239"
+            __dockerImage=" mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-14.04-cross-0cd4667-20172211042239"
             __skipRootFS=1
             __dockerEnvironmentVariables+=" -e ROOTFS_DIR=/crossrootfs/arm"
             __runtimeOS="ubuntu.14.04"
         ;;
         xenial)
-            __dockerImage=" microsoft/dotnet-buildtools-prereqs:ubuntu-16.04-cross-ef0ac75-20175511035548"
+            __dockerImage=" mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-ef0ac75-20175511035548"
             __skipRootFS=1
             __dockerEnvironmentVariables+=" -e ROOTFS_DIR=/crossrootfs/arm"
             __runtimeOS="ubuntu.16.04"
@@ -372,12 +372,12 @@ function run_tests_using_docker {
     if [ "$__buildArch" == "arm" ]; then
         case $__linuxCodeName in
         trusty)
-            __dockerImage=" microsoft/dotnet-buildtools-prereqs:ubuntu1404_cross_prereqs_v3"
+            __dockerImage=" mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu1404_cross_prereqs_v3"
             __skipRootFS=1
             __dockerEnvironmentVariables=" -e ROOTFS_DIR=/crossrootfs/arm"
         ;;
         xenial)
-            __dockerImage=" microsoft/dotnet-buildtools-prereqs:ubuntu1604_cross_prereqs_v3"
+            __dockerImage=" mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu1604_cross_prereqs_v3"
             __skipRootFS=1
             __dockerEnvironmentVariables=" -e ROOTFS_DIR=/crossrootfs/arm"
         ;;
diff --git a/src/tests/Common/scripts/run-pmi-diffs.py b/src/tests/Common/scripts/run-pmi-diffs.py
index 106137eaeaefd..f711030e9cb47 100755
--- a/src/tests/Common/scripts/run-pmi-diffs.py
+++ b/src/tests/Common/scripts/run-pmi-diffs.py
@@ -48,10 +48,10 @@
 
 # The Docker file and possibly options should be hoisted out to a text file to be shared between scripts.
 
-Docker_name_arm32 = 'microsoft/dotnet-buildtools-prereqs:ubuntu-14.04-cross-e435274-20180426002420'
+Docker_name_arm32 = 'mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-14.04-cross-e435274-20180426002420'
 Docker_opts_arm32 = '-e ROOTFS_DIR=/crossrootfs/arm'
 
-Docker_name_arm64 = 'microsoft/dotnet-buildtools-prereqs:ubuntu-16.04-cross-arm64-a3ae44b-20180315221921'
+Docker_name_arm64 = 'mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-16.04-cross-arm64-a3ae44b-20180315221921'
 Docker_opts_arm64 = '-e ROOTFS_DIR=/crossrootfs/arm64'
 
 Is_illumos = ('illumos' in subprocess.Popen(["uname", "-o"], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[0].decode('utf-8'))