diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index fd658eb..ecedb48 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -6,8 +6,15 @@
 trigger:
 - master
 
+strategy:
+  matrix:
+    ubuntu1:
+      imageName: 'ubuntu-16.04'
+    ubuntu2:
+      imageName: 'ubuntu-16.04'
+
 pool:
-  vmImage: 'ubuntu-latest'
+  vmImage: $(imageName)
 
 steps:
 - script: echo Hello, world!