Add flaky eth-tester tests to tox testenv list

Author: kclowes

tox.ini

@@ -35,7 +35,7 @@ commands=
     integration-goethereum-ws-v2: pytest {posargs:tests/integration/go_ethereum/test_goethereum_ws_v2}
     integration-goethereum-ws-v2_flaky: pytest {posargs:tests/integration/go_ethereum/test_goethereum_ws_v2 --flaky}
     integration-ethtester: pytest {posargs:tests/integration/test_ethereum_tester.py}
-    integration-ethtester_flaky: pytest {posargs:tests/integration/test_ethereum_tester.py --flaky}
+    integration-ethtester-pyevm_flaky: pytest {posargs:tests/integration/test_ethereum_tester.py --flaky}
     docs: make -C {toxinidir} validate-docs
 deps =
     .[dev]