fix failing server API tests

Author: baileympearson

test/tools/runner/config.ts

@@ -83,7 +83,7 @@ export class TestConfiguration {
     auth?: { username: string; password: string; authSource?: string };
     proxyURIParams?: ProxyParams;
   };
-  serverApi: ServerApi;
+  serverApi?: ServerApi;
   activeResources: number;
   isSrv: boolean;
   serverlessCredentials: { username: string | undefined; password: string | undefined };
@@ -176,7 +176,7 @@ export class TestConfiguration {
    * Returns a `hello`, executed against `uri`.
    */
   async hello(uri = this.uri) {
-    const client = new MongoClient(uri);
+    const client = this.newClient(uri);
     try {
       await client.connect();
       const { maxBsonObjectSize, maxMessageSizeBytes, maxWriteBatchSize, ...rest } = await client
@@ -199,7 +199,7 @@ export class TestConfiguration {
   }
 
   newClient(urlOrQueryOptions?: string | Record<string, any>, serverOptions?: MongoClientOptions) {
-    serverOptions = Object.assign({}, getEnvironmentalOptions(), serverOptions);
+    serverOptions = Object.assign(<MongoClientOptions>{}, getEnvironmentalOptions(), serverOptions);
 
     // Support MongoClient constructor form (url, options) for `newClient`.
     if (typeof urlOrQueryOptions === 'string') {