diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 4e35534222..3f151fcacf 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -31,6 +31,7 @@ stages:
     timeoutInMinutes: 600
     steps:
     - checkout: self
+      clean: true
       submodules: recursive
       displayName: 'Checkout code'
     - script: |
@@ -55,6 +56,7 @@ stages:
     timeoutInMinutes: 600
     steps:
     - checkout: self
+      clean: true
       submodules: recursive
       displayName: 'Checkout code'
 
@@ -80,6 +82,7 @@ stages:
     timeoutInMinutes: 600
     steps:
     - checkout: self
+      clean: true
       submodules: recursive
       displayName: 'Checkout code'