diff --git a/Assets/Tests/InputSystem/CoreTests_Actions.cs b/Assets/Tests/InputSystem/CoreTests_Actions.cs
index 2e28963bb0..3a3ee6d57a 100644
--- a/Assets/Tests/InputSystem/CoreTests_Actions.cs
+++ b/Assets/Tests/InputSystem/CoreTests_Actions.cs
@@ -21,11 +21,10 @@
 using UnityEngine.TestTools;
 using UnityEngine.TestTools.Utils;
 using UnityEngine.TestTools.Constraints;
-using Is = UnityEngine.TestTools.Constraints.Is;
 
-#pragma warning disable CS0649
-[SuppressMessage("ReSharper", "AccessToStaticMemberViaDerivedType")]
+using Is = NUnit.Framework.Is;
 
+#pragma warning disable CS0649
 // As should be obvious from the number of tests in here, the action system rivals the entire combined rest of the system
 // in terms of complexity.
 partial class CoreTests
diff --git a/Assets/Tests/InputSystem/CoreTests_Controls.cs b/Assets/Tests/InputSystem/CoreTests_Controls.cs
index 7834b3324d..be5f459c45 100644
--- a/Assets/Tests/InputSystem/CoreTests_Controls.cs
+++ b/Assets/Tests/InputSystem/CoreTests_Controls.cs
@@ -16,7 +16,7 @@
 using UnityEngine.InputSystem.Utilities;
 using UnityEngine.Profiling;
 using UnityEngine.TestTools.Constraints;
-using Is = UnityEngine.TestTools.Constraints.Is;
+using Is = NUnit.Framework.Is;
 
 partial class CoreTests
 {
diff --git a/Assets/Tests/InputSystem/CoreTests_Devices.cs b/Assets/Tests/InputSystem/CoreTests_Devices.cs
index 7c4006f6ee..af4d28cd79 100644
--- a/Assets/Tests/InputSystem/CoreTests_Devices.cs
+++ b/Assets/Tests/InputSystem/CoreTests_Devices.cs
@@ -21,7 +21,7 @@
 using UnityEngine.TestTools.Utils;
 using Gyroscope = UnityEngine.InputSystem.Gyroscope;
 using UnityEngine.TestTools.Constraints;
-using Is = UnityEngine.TestTools.Constraints.Is;
+using Is = NUnit.Framework.Is;
 using Quaternion = UnityEngine.Quaternion;
 using TouchPhase = UnityEngine.InputSystem.TouchPhase;
 using Vector2 = UnityEngine.Vector2;
diff --git a/Assets/Tests/InputSystem/CoreTests_Events.cs b/Assets/Tests/InputSystem/CoreTests_Events.cs
index c3dc4c7cfd..4034353352 100644
--- a/Assets/Tests/InputSystem/CoreTests_Events.cs
+++ b/Assets/Tests/InputSystem/CoreTests_Events.cs
@@ -19,7 +19,8 @@
 using UnityEngine.TestTools;
 using UnityEngine.TestTools.Constraints;
 using UnityEngine.TestTools.Utils;
-using Is = UnityEngine.TestTools.Constraints.Is;
+
+using Is = NUnit.Framework.Is;
 using Random = UnityEngine.Random;
 using TouchPhase = UnityEngine.InputSystem.TouchPhase;
 
diff --git a/Assets/Tests/InputSystem/CoreTests_MouseEvents.cs b/Assets/Tests/InputSystem/CoreTests_MouseEvents.cs
index 4d797d469c..2b14c4b41d 100644
--- a/Assets/Tests/InputSystem/CoreTests_MouseEvents.cs
+++ b/Assets/Tests/InputSystem/CoreTests_MouseEvents.cs
@@ -6,7 +6,6 @@
 using UnityEngine;
 using UnityEngine.InputSystem;
 using UnityEngine.TestTools;
-using Is = UnityEngine.TestTools.Constraints.Is;
 
 partial class CoreTests
 {
diff --git a/Assets/Tests/InputSystem/Plugins/PlayerInputTests.cs b/Assets/Tests/InputSystem/Plugins/PlayerInputTests.cs
index b0977877e5..dd7323d1ab 100644
--- a/Assets/Tests/InputSystem/Plugins/PlayerInputTests.cs
+++ b/Assets/Tests/InputSystem/Plugins/PlayerInputTests.cs
@@ -16,7 +16,7 @@
 using UnityEngine.TestTools.Constraints;
 using Object = UnityEngine.Object;
 using Gyroscope = UnityEngine.InputSystem.Gyroscope;
-using Is = UnityEngine.TestTools.Constraints.Is;
+using Is = NUnit.Framework.Is;
 using UnityEngine.InputSystem.OnScreen;
 
 /// <summary>
diff --git a/Assets/Tests/InputSystem/Plugins/UITests.cs b/Assets/Tests/InputSystem/Plugins/UITests.cs
index 101471f671..fe077139b0 100644
--- a/Assets/Tests/InputSystem/Plugins/UITests.cs
+++ b/Assets/Tests/InputSystem/Plugins/UITests.cs
@@ -21,7 +21,7 @@
 using UnityEngine.TestTools.Utils;
 using UnityEngine.UI;
 using Image = UnityEngine.UI.Image;
-using Is = UnityEngine.TestTools.Constraints.Is;
+using Is = NUnit.Framework.Is;
 using MouseButton = UnityEngine.InputSystem.LowLevel.MouseButton;
 using UnityEngine.Scripting;
 using Cursor = UnityEngine.Cursor;