diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 22c515e0c..9920eade1 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -38,7 +38,7 @@ jobs:
       build-directory: NuGetTest
       timeout-minutes: 20
       # This is a test configuration for https://github.com/Lombiq/UI-Testing-Toolbox/issues/228.
-      ui-test-parallelism: 0
+      xunit-max-parallel-threads: -1
 
   spelling:
     name: Spelling
diff --git a/tools/Lombiq.GitHub.Actions b/tools/Lombiq.GitHub.Actions
index 0d9808784..d3eb442df 160000
--- a/tools/Lombiq.GitHub.Actions
+++ b/tools/Lombiq.GitHub.Actions
@@ -1 +1 @@
-Subproject commit 0d9808784cad08c89a299c33ed100793880ba62b
+Subproject commit d3eb442df1a8d416a4e13eefdea83867f455374d