diff --git a/tests/check/libs/gstglmatrix.c b/tests/check/libs/gstglmatrix.c
index 2fcdb3ae5b..fe49b50f6c 100644
--- a/tests/check/libs/gstglmatrix.c
+++ b/tests/check/libs/gstglmatrix.c
@@ -333,6 +333,8 @@ GST_START_TEST (test_matrix_vertex_y_invert)
         "value %f at index %u does not match " "expected value %f", res[i], i,
         expected[i]);
   }
+
+  gst_buffer_unref (buffer);
 }
 
 GST_END_TEST;