diff --git a/tests/state_test_util.go b/tests/state_test_util.go
index 8027e9a06c..56ddf61b69 100644
--- a/tests/state_test_util.go
+++ b/tests/state_test_util.go
@@ -489,5 +489,6 @@ func (st *StateTestState) Close() {
 		// Need to call Disable here to quit the snapshot generator goroutine.
 		st.Snapshots.Disable()
 		st.Snapshots.Release()
+		st.Snapshots = nil
 	}
 }