Fix content.integration tests warnings (#17817)

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.IntegrationTests/Tests/Networking/NetworkIdsMatchTest.cs

@@ -1,13 +1,9 @@
-using System.Threading.Tasks;
-using NUnit.Framework;
 using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
-using Robust.Shared.Network;
 
 namespace Content.IntegrationTests.Tests.Networking
 {
     [TestFixture]
-    sealed class NetworkIdsMatchTest
+    public sealed class NetworkIdsMatchTest
     {
         [Test]
         public async Task TestConnect()
@@ -22,17 +18,26 @@ namespace Content.IntegrationTests.Tests.Networking
             var clientNetComps = clientCompFactory.NetworkedComponents;
             var serverNetComps = serverCompFactory.NetworkedComponents;
 
-            Assert.That(clientNetComps, Is.Not.Null);
-            Assert.That(serverNetComps, Is.Not.Null);
-            Assert.That(clientNetComps.Count, Is.EqualTo(serverNetComps.Count));
-
-            // Checks that at least Metadata and Transform are registered.
-            Assert.That(clientNetComps.Count, Is.GreaterThanOrEqualTo(2));
-
-            for (var netId = 0; netId < clientNetComps.Count; netId++)
+            Assert.Multiple(() =>
             {
-                Assert.That(clientNetComps[netId].Name, Is.EqualTo(serverNetComps[netId].Name));
-            }
+                Assert.That(clientNetComps, Is.Not.Null);
+                Assert.That(serverNetComps, Is.Not.Null);
+            });
+            Assert.Multiple(() =>
+            {
+                Assert.That(clientNetComps, Has.Count.EqualTo(serverNetComps.Count));
+
+                // Checks that at least Metadata and Transform are registered.
+                Assert.That(clientNetComps, Has.Count.GreaterThanOrEqualTo(2));
+            });
+
+            Assert.Multiple(() =>
+            {
+                for (var netId = 0; netId < clientNetComps.Count; netId++)
+                {
+                    Assert.That(clientNetComps[netId].Name, Is.EqualTo(serverNetComps[netId].Name));
+                }
+            });
             await pairTracker.CleanReturnAsync();
         }
     }