test(NODE-3049): drivers atlas testing

Author: durran

test/tools/unified-spec-runner/operations.ts

@@ -12,6 +12,7 @@ import {
   type Document,
   type GridFSFile,
   type MongoClient,
+  MongoError,
   type ObjectId,
   ReadConcern,
   ReadPreference,
@@ -437,7 +438,8 @@ operations.set('loop', async ({ entities, operation, client, testConfig }) => {
           entities
             .getEntity('failures', storeFailuresAsEntity)
             .push({ error: error.message, time: Date.now() });
-        } else if (storeErrorsAsEntity) {
+        } else if (storeErrorsAsEntity && !(error instanceof MongoError)) {
+          // Checking not a MongoError ensures it's coming from the test runner.
           entities
             .getEntity('errors', storeErrorsAsEntity)
             .push({ error: error.message, time: Date.now() });