diff --git a/tools/lint/tests/data/modmerge.xml b/tools/lint/tests/data/modmerge.xml
new file mode 100644
index 0000000..b52eff5
--- /dev/null
+++ b/tools/lint/tests/data/modmerge.xml
@@ -0,0 +1,4 @@
+<mmc xmlns="urn:yanglint:modmerge">
+  <en>one</en>
+  <lm>4</lm>
+</mmc>
diff --git a/tools/lint/tests/data/modmerge2.xml b/tools/lint/tests/data/modmerge2.xml
new file mode 100644
index 0000000..e7f17c4
--- /dev/null
+++ b/tools/lint/tests/data/modmerge2.xml
@@ -0,0 +1,3 @@
+<mmc xmlns="urn:yanglint:modmerge">
+  <en>zero</en>
+</mmc>
diff --git a/tools/lint/tests/data/modmerge3.xml b/tools/lint/tests/data/modmerge3.xml
new file mode 100644
index 0000000..6ef857e
--- /dev/null
+++ b/tools/lint/tests/data/modmerge3.xml
@@ -0,0 +1,3 @@
+<mmc xmlns="urn:yanglint:modmerge">
+  <lf>str</lf>
+</mmc>