diff --git a/.github/workflows/run_tests_osx.yml b/.github/workflows/run_tests_osx.yml
index 8e9d65a6fb..7919887794 100644
--- a/.github/workflows/run_tests_osx.yml
+++ b/.github/workflows/run_tests_osx.yml
@@ -7,7 +7,7 @@
 name: Run macOS-based netCDF Tests
 
 
-on: [pull_request]
+on: [pull_request, workflow_dispatch]
 
 jobs:
 
diff --git a/.github/workflows/run_tests_win_mingw.yml b/.github/workflows/run_tests_win_mingw.yml
index 913920a3aa..061ef02461 100644
--- a/.github/workflows/run_tests_win_mingw.yml
+++ b/.github/workflows/run_tests_win_mingw.yml
@@ -7,7 +7,7 @@
 name: Run MSYS2, MinGW64-based Tests
 
 
-on: [pull_request]
+on: [pull_request, workflow_dispatch]
 
 jobs: