diff --git a/test/test_functest.py b/test/test_functest.py
index be45404d..4923d74a 100644
--- a/test/test_functest.py
+++ b/test/test_functest.py
@@ -60,21 +60,25 @@ def check_functest_sanitizers(implementation):
                  EXTRAFLAGS='-fsanitize=address,undefined',
                  working_dir=os.path.join('..', 'test'),
                  env=env)
-    helpers.run_subprocess(
-        [os.path.join('..', 'bin', 'functest_{}_{}{}'.format(
-            implementation.scheme.name,
-            implementation.name,
-            '.exe' if os.name == 'nt' else ''
-        ))],
-        os.path.join('..', 'bin'),
-        env=env,
-    )
-    # Remove files with ASAN library compiled in
-    helpers.make('clean-scheme',
-                 TYPE=implementation.scheme.type,
-                 SCHEME=implementation.scheme.name,
-                 IMPLEMENTATION=implementation.name,
-                 working_dir=os.path.join('..', 'test'))
+    try:
+        helpers.run_subprocess(
+            [os.path.join('..', 'bin', 'functest_{}_{}{}'.format(
+                implementation.scheme.name,
+                implementation.name,
+                '.exe' if os.name == 'nt' else ''
+            ))],
+            os.path.join('..', 'bin'),
+            env=env,
+        )
+    except AssertionError as e:
+        raise e
+    finally:
+        # Remove files with ASAN library compiled in
+        helpers.make('clean-scheme',
+                     TYPE=implementation.scheme.type,
+                     SCHEME=implementation.scheme.name,
+                     IMPLEMENTATION=implementation.name,
+                     working_dir=os.path.join('..', 'test'))
 
 
 if __name__ == '__main__':