diff --git a/.github/workflows/ci.ml b/.github/workflows/ci.ml
index c54c7131bbf..4a2db1f3eb0 100644
--- a/.github/workflows/ci.ml
+++ b/.github/workflows/ci.ml
@@ -339,6 +339,8 @@ let main_build_job ~analyse_job ~cygwin_job ?section runner start_version ~oc ~w
     ++ build_cache OCaml platform "${{ matrix.ocamlv }}" host
     ++ run "Build" ["bash -exu .github/scripts/main/main.sh " ^ host]
     ++ not_on Windows (run "Test (basic)" ["bash -exu .github/scripts/main/test.sh"])
+    ++ only_on Windows (run ~cond:(Predicate(true, EndsWith("matrix.host", "-w64-mingw32"))) "Test static binary" ["ldd ./opam.exe | grep -F libstdc++-6.dll ; test $? = 1"])
+    ++ only_on Windows (run ~cond:(Predicate(false, EndsWith("matrix.host", "-w64-mingw32"))) "Test static binary" ["ldd ./opam.exe | grep -F libstdc++-6.dll"])
     ++ only_on Windows (run "Test (basic - Cygwin)" ~cond:(Predicate(true, EndsWith("matrix.host", "-pc-cygwin"))) ["bash -exu .github/scripts/main/test.sh"])
     ++ only_on Windows (run "Test (basic - native Windows)" ~env:[("OPAMROOT", {|D:\a\opam\opam\.opam|})] ~shell:"cmd" ~cond:(Predicate(false, EndsWith("matrix.host", "-pc-cygwin")))
          ({|set Path=D:\Cache\ocaml-local\bin;%Path%|} ::
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 463a31f34e2..88308c60c24 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -204,6 +204,12 @@ jobs:
       run: bash -exu .github/scripts/main/ocaml-cache.sh ${{ runner.os }} ${{ matrix.ocamlv }} ${{ matrix.host }}
     - name: Build
       run: bash -exu .github/scripts/main/main.sh ${{ matrix.host }}
+    - name: Test static binary
+      if: endsWith(matrix.host, '-w64-mingw32')
+      run: ldd ./opam.exe | grep -F libstdc++-6.dll ; test $? = 1
+    - name: Test static binary
+      if: endsWith(matrix.host, '-w64-mingw32') == false
+      run: ldd ./opam.exe | grep -F libstdc++-6.dll
     - name: Test (basic - Cygwin)
       if: endsWith(matrix.host, '-pc-cygwin')
       run: bash -exu .github/scripts/main/test.sh