diff --git a/lib/tests/modules.sh b/lib/tests/modules.sh
index ad2ea44c361a4..c383985760929 100755
--- a/lib/tests/modules.sh
+++ b/lib/tests/modules.sh
@@ -190,6 +190,9 @@ checkConfigOutput '^420$' config.bare-submodule.deep ./declare-bare-submodule.ni
 checkConfigOutput '^2$' config.bare-submodule.deep ./declare-bare-submodule.nix ./declare-bare-submodule-deep-option.nix ./define-shorthandOnlyDefinesConfig-true.nix
 checkConfigError 'The option .bare-submodule.deep. in .*/declare-bare-submodule-deep-option.nix. is already declared in .*/declare-bare-submodule-deep-option-duplicate.nix' config.bare-submodule.deep ./declare-bare-submodule.nix ./declare-bare-submodule-deep-option.nix  ./declare-bare-submodule-deep-option-duplicate.nix
 
+# Check that strMatching can be merged
+checkConfigOutput '^"strMatching.*"$' options.sm.type.name ./strMatching-merge.nix
+
 # Check integer types.
 # unsigned
 checkConfigOutput '^42$' config.value ./declare-int-unsigned-value.nix ./define-value-int-positive.nix
diff --git a/lib/tests/modules/strMatching-merge.nix b/lib/tests/modules/strMatching-merge.nix
new file mode 100644
index 0000000000000..2e043a5f97237
--- /dev/null
+++ b/lib/tests/modules/strMatching-merge.nix
@@ -0,0 +1,15 @@
+{ lib, ... }:
+{
+  imports = [
+    {
+      options.sm = lib.mkOption {
+        type = lib.types.strMatching "\(.*\)";
+      };
+    }
+    {
+      options.sm = lib.mkOption {
+        type = lib.types.strMatching "\(.*\)";
+      };
+    }
+  ];
+}