Address review comments

src/testing-utils.ts

@@ -32,6 +32,7 @@ import {
   GitHubVariant,
   GitHubVersion,
   HTTPError,
+  resetCachedCodeQlVersion,
 } from "./util";
 
 export const SAMPLE_DOTCOM_API_DETAILS = {
@@ -101,6 +102,10 @@ export function setupTests(testFn: TestFn<any>) {
     // unless the test explicitly sets one up.
     codeql.setCodeQL({});
 
+    // Reset the in-process CodeQL version cache so that it doesn't leak between
+    // tests, which each represent a separate Actions step in production.
+    resetCachedCodeQlVersion();
+
     // Replace stdout and stderr so we can record output during tests
     t.context.testOutput = "";
     const processStdoutWrite = process.stdout.write.bind(process.stdout);