diff --git a/test/matrix/test_m_scaling.scad b/test/matrix/test_m_scaling.scad
new file mode 100644
index 00000000..6f1aaf45
--- /dev/null
+++ b/test/matrix/test_m_scaling.scad
@@ -0,0 +1,12 @@
+use <matrix/m_scaling.scad>;
+
+module test_m_scaling() {
+    echo("==== test_m_scaling ====");
+
+    expected = [[2, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]];
+    actual = m_scaling([2, 1, 1]);
+
+    assert(expected == actual);
+}
+
+test_m_scaling();
\ No newline at end of file