diff --git a/tests/suites/test_suite_entropy.function b/tests/suites/test_suite_entropy.function
index d9ea44149..2a7b0de13 100644
--- a/tests/suites/test_suite_entropy.function
+++ b/tests/suites/test_suite_entropy.function
@@ -217,6 +217,9 @@ void entropy_func_len( int len, int ret )
 
     for( j = len; j < sizeof( buf ); j++ )
         TEST_ASSERT( acc[j] == 0 );
+
+exit:
+    mbedtls_entropy_free( &ctx );
 }
 /* END_CASE */