test/integration: increase test timeout

Fixes golang/vscode-go#2239.

Change-Id: I63d0b58c408497c5eb333ffd48761841b4c5b1c2
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/405996
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/test/integration/goTest.run.test.ts b/test/integration/goTest.run.test.ts
index 2e894b1..7fc5b5f 100644
--- a/test/integration/goTest.run.test.ts
+++ b/test/integration/goTest.run.test.ts
@@ -170,6 +170,6 @@
 			console.log('Attempt to run subtest and other test');
 			assert(await testExplorer.runner.run({ include: [tSub, tOther] }), 'Failed to execute `go test`');
 			assert.strictEqual(spy.callCount, 0, 'expected no calls to goTest');
-		});
+		}).timeout(4000);
 	});
 });