Clean shutdown of apiserver integration tests

test/integration/apiserver/apiserver_test.go

@@ -401,10 +401,14 @@ func TestListOptions(t *testing.T) {
 			}
 
 			// compact some of the revision history in etcd so we can test "too old" resource versions
-			_, kvClient, err := integration.GetEtcdClients(*storageTransport)
+			rawClient, kvClient, err := integration.GetEtcdClients(*storageTransport)
 			if err != nil {
 				t.Fatal(err)
 			}
+			// kvClient is a wrapper around rawClient and to avoid leaking goroutines we need to
+			// close the client (which we can do by closing rawClient).
+			defer rawClient.Close()
+
 			revision, err := strconv.Atoi(oldestUncompactedRv)
 			if err != nil {
 				t.Fatal(err)