diff --git a/.azure-pipelines/ci.yml b/.azure-pipelines/ci.yml
index 50dc50a6549..531ed060fd3 100644
--- a/.azure-pipelines/ci.yml
+++ b/.azure-pipelines/ci.yml
@@ -1,18 +1,14 @@
 variables:
-  manylinux: false
   coverage: false
 
-resources:
-  containers:
-  - container: manylinux1
-    image: pyca/cryptography-manylinux1:x86_64
+trigger: ['master', '3.9', '3.8', '3.7']
 
 jobs:
 - job: Prebuild
   displayName: Pre-build checks
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   steps:
   - template: ./prebuild-checks.yml
@@ -24,7 +20,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['docs.run'], 'true'))
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   steps:
   - template: ./docs-steps.yml
@@ -56,7 +52,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['tests.run'], 'true'))
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   variables:
     testRunTitle: '$(build.sourceBranchName)-linux'
@@ -69,37 +65,6 @@ jobs:
       dependencies: apt
 
 
-- job: ManyLinux1_CI_Tests
-  displayName: ManyLinux1 CI Tests
-  dependsOn: Prebuild
-  condition: |
-    and(
-        and(
-            succeeded(),
-            eq(variables['manylinux'], 'true')
-        ),
-        eq(dependencies.Prebuild.outputs['tests.run'], 'true')
-    )
-
-  pool:
-    vmImage: ubuntu-16.04
-
-  container: manylinux1
-
-  variables:
-    testRunTitle: '$(build.sourceBranchName)-manylinux1'
-    testRunPlatform: manylinux1
-    openssl_version: ''
-
-  steps:
-  - template: ./posix-steps.yml
-    parameters:
-      dependencies: yum
-      sudo_dependencies: ''
-      xvfb: false
-      patchcheck: false
-
-
 - job: Ubuntu_Coverage_CI_Tests
   displayName: Ubuntu CI Tests (coverage)
   dependsOn: Prebuild
@@ -113,7 +78,7 @@ jobs:
     )
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   variables:
     testRunTitle: '$(Build.SourceBranchName)-linux-coverage'
diff --git a/.azure-pipelines/pr.yml b/.azure-pipelines/pr.yml
index 228f9db4f8e..1ffe0a97a24 100644
--- a/.azure-pipelines/pr.yml
+++ b/.azure-pipelines/pr.yml
@@ -1,18 +1,14 @@
 variables:
-  manylinux: false
   coverage: false
 
-resources:
-  containers:
-  - container: manylinux1
-    image: pyca/cryptography-manylinux1:x86_64
+pr: ['master', '3.9', '3.8', '3.7']
 
 jobs:
 - job: Prebuild
   displayName: Pre-build checks
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   steps:
   - template: ./prebuild-checks.yml
@@ -24,7 +20,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['docs.run'], 'true'))
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   steps:
   - template: ./docs-steps.yml
@@ -56,7 +52,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['tests.run'], 'true'))
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   variables:
     testRunTitle: '$(system.pullRequest.TargetBranch)-linux'
@@ -69,37 +65,6 @@ jobs:
       dependencies: apt
 
 
-- job: ManyLinux1_PR_Tests
-  displayName: ManyLinux1 PR Tests
-  dependsOn: Prebuild
-  condition: |
-    and(
-        and(
-            succeeded(),
-            eq(variables['manylinux'], 'true')
-        ),
-        eq(dependencies.Prebuild.outputs['tests.run'], 'true')
-    )
-
-  pool:
-    vmImage: ubuntu-16.04
-
-  container: manylinux1
-
-  variables:
-    testRunTitle: '$(system.pullRequest.TargetBranch)-manylinux1'
-    testRunPlatform: manylinux1
-    openssl_version: ''
-
-  steps:
-  - template: ./posix-steps.yml
-    parameters:
-      dependencies: yum
-      sudo_dependencies: ''
-      xvfb: false
-      patchcheck: false
-
-
 - job: Ubuntu_Coverage_PR_Tests
   displayName: Ubuntu PR Tests (coverage)
   dependsOn: Prebuild
@@ -113,7 +78,7 @@ jobs:
     )
 
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
 
   variables:
     testRunTitle: '$(Build.SourceBranchName)-linux-coverage'