diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b37e91c..0e7c1e5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -56,6 +56,10 @@ jobs:
           nmake /NOLOGO /F Makefile.win
           nmake /NOLOGO /F Makefile.win install
           nmake /NOLOGO /F Makefile.win installcheck
+          curl -Ls -o REL_14_5.tar.gz https://github.com/postgres/postgres/archive/refs/tags/REL_14_5.tar.gz
+          7z x REL_14_5.tar.gz
+          ls -R .
           set PROVE=prove
+          set PROVE_FLAGS="-I ./postgres-REL_14_5/src/test/perl"
           nmake /NOLOGO /F Makefile.win prove_installcheck
         shell: cmd