diff --git a/license/__init__.py b/license/__init__.py
index 19950b4..7944286 100644
--- a/license/__init__.py
+++ b/license/__init__.py
@@ -18,4 +18,10 @@ def compiles():
 @check50.check(compiles)
 def valid():
     """license prints all plates."""
-    check50.run("./license plates.txt").stdout("11ZT00\n1KAD21\n78ZZ01\n99ZZ11\n72ZZ21\n98ZZ31\n44ZW41\n34ZZ51")
\ No newline at end of file
+    check50.run("./license plates.txt").stdout("11ZT00\n1KAD21\n78ZZ01\n99ZZ11\n72ZZ21\n98ZZ31\n44ZW41\n34ZZ51")
+
+
+@check50.check(compiles)
+def frees_memory():
+    """results in no memory leakages"""
+    check50.c.valgrind("./license plates.txt").exit(0)