diff --git a/tests/suites/test_suite_lmots.function b/tests/suites/test_suite_lmots.function
index c582ce700..1fec900fc 100644
--- a/tests/suites/test_suite_lmots.function
+++ b/tests/suites/test_suite_lmots.function
@@ -142,6 +142,8 @@ void lmots_verify_test ( data_t *msg, data_t *sig, data_t *pub_key,
     }
 
 exit:
+    if( tmp_sig != NULL )
+        mbedtls_free( tmp_sig );
     mbedtls_lmots_public_free( &ctx );
 }
 /* END_CASE */
diff --git a/tests/suites/test_suite_lms.function b/tests/suites/test_suite_lms.function
index c0cf02cb8..b6ae30918 100644
--- a/tests/suites/test_suite_lms.function
+++ b/tests/suites/test_suite_lms.function
@@ -138,6 +138,8 @@ void lms_verify_test ( data_t * msg, data_t * sig, data_t * pub_key,
     }
 
 exit:
+    if( tmp_sig != NULL )
+        mbedtls_free( tmp_sig );
     mbedtls_lms_public_free( &ctx );
 }
 /* END_CASE */
@@ -180,6 +182,8 @@ void lms_import_export_test (  data_t * pub_key, int expected_import_rc )
     }
 
 exit:
+    if( exported_pub_key != NULL )
+        mbedtls_free( exported_pub_key );
     mbedtls_lms_public_free( &ctx );
 }
 /* END_CASE */