diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 7953b282b..bc76f85c9 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -370,7 +370,7 @@ stages:
     displayName: macOS CPU clang
 
     pool:
-      vmImage: macos-latest
+      vmImage: macos-10.15
 
     steps:
     - checkout: self