diff --git a/.github/workflows/msvcrt.yml b/.github/workflows/msvcrt.yml
index c1a3b91..99d9cfc 100644
--- a/.github/workflows/msvcrt.yml
+++ b/.github/workflows/msvcrt.yml
@@ -124,6 +124,8 @@ jobs:
           sudo apt-get update && sudo apt-get install libltdl-dev swig autoconf-archive
           ./build-cross-tools.sh /opt/llvm-mingw $(pwd)/install/llvm-mingw ${{matrix.arch}} --with-python --thinlto --pgo
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
+          ./test-libcxx-module.sh $(pwd)/install/llvm-mingw
+          ./run-tests.sh $(pwd)/install/llvm-mingw
           cd install
           NAME=llvm-mingw-$TAG-${{matrix.crt}}-${{matrix.arch}}
           mv llvm-mingw $NAME