diff --git a/.azure-pipelines-ci/ci.yaml b/.azure-pipelines-ci/ci.yaml
index 54ee9f3c8..71ec55030 100644
--- a/.azure-pipelines-ci/ci.yaml
+++ b/.azure-pipelines-ci/ci.yaml
@@ -29,8 +29,10 @@ stages:
               vmImage: ubuntu-16.04
             Ubuntu_18_04:
               vmImage: ubuntu-18.04
-            macOS:
-              vmImage: macos-latest
+            macOS_10_14_Mojave:
+              vmImage: macOS-10.14
+            macOS_10_15_Catalina:
+              vmImage: macOS-10.15
             Windows_Server2016_PowerShell_Core:
               vmImage: vs2017-win2016
             Windows_Server2019_PowerShell_Core: