diff --git a/test/WireMock.Net.Tests/WebSockets/WebSocketIntegrationTests.cs b/test/WireMock.Net.Tests/WebSockets/WebSocketIntegrationTests.cs
index 1ea8f1ef..49071a21 100644
--- a/test/WireMock.Net.Tests/WebSockets/WebSocketIntegrationTests.cs
+++ b/test/WireMock.Net.Tests/WebSockets/WebSocketIntegrationTests.cs
@@ -11,6 +11,7 @@ using WireMock.Settings;
 
 namespace WireMock.Net.Tests.WebSockets;
 
+[Collection(nameof(WebSocketIntegrationTests))]
 public class WebSocketIntegrationTests(ITestOutputHelper output, ITestContextAccessor testContext)
 {
     private readonly CancellationToken _ct = testContext.Current.CancellationToken;
diff --git a/test/WireMock.Net.Tests/WebSockets/WireMockServerWebSocketIntegrationTests.cs b/test/WireMock.Net.Tests/WebSockets/WireMockServerWebSocketIntegrationTests.cs
index 1d6c7da5..28cf6180 100644
--- a/test/WireMock.Net.Tests/WebSockets/WireMockServerWebSocketIntegrationTests.cs
+++ b/test/WireMock.Net.Tests/WebSockets/WireMockServerWebSocketIntegrationTests.cs
@@ -10,6 +10,7 @@ using WireMock.Settings;
 
 namespace WireMock.Net.Tests.WebSockets;
 
+[Collection(nameof(WireMockServerWebSocketIntegrationTests))]
 public class WireMockServerWebSocketIntegrationTests(ITestOutputHelper output, ITestContextAccessor testContext)
 {
     private readonly CancellationToken _ct = testContext.Current.CancellationToken;