diff --git a/.gitlab/ci/ubuntu-bionic.yml b/.gitlab/ci/ubuntu-bionic.yml
index d9b474e..2ffe5e1 100644
--- a/.gitlab/ci/ubuntu-bionic.yml
+++ b/.gitlab/ci/ubuntu-bionic.yml
@@ -14,6 +14,11 @@ swift 5.2:
   extends: .unit-test
   image: swift:5.2-bionic
 
+swift 5.3:
+  extends: .unit-test
+  image: swiftlang/swift:nightly-5.3-bionic
+  allow_failure: true
+
 swift trunk:
   extends: .unit-test
   image: swiftlang/swift:nightly-master-bionic
diff --git a/.gitlab/ci/ubuntu-xenial.yml b/.gitlab/ci/ubuntu-xenial.yml
index b5ad968..d43caf1 100644
--- a/.gitlab/ci/ubuntu-xenial.yml
+++ b/.gitlab/ci/ubuntu-xenial.yml
@@ -14,6 +14,10 @@ swift 5.2:
   extends: .unit-test
   image: swift:5.2-xenial
 
+swift 5.3:
+  extends: .unit-test
+  image: swiftlang/swift:nightly-5.3-xenial
+
 swift trunk:
   extends: .unit-test
   image: swiftlang/swift:nightly-master-xenial