diff --git a/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md b/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
index ae67aba..9d4df00 100644
--- a/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
+++ b/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
@@ -49,6 +49,9 @@ Addition input path prefix are:
 ## Legacy tests
 
 Both General State Tests and Block Chain Tests contains legacy test suite and new test suite. If you want to select legacy test suite, please use `--legacy:true`. Default configuration will new test suite. Legacy test suite contains test data for Frontier up to Constantinople. New test suite contains test data for Istanbul onward.
+```
+nim c -d:release -r tests/test_generalstate_json.nim stSStoreTest/InitCollision.json --index:1 --legacy:true
+```
 
 ## VMTests