diff --git a/Assets/AirConsole/ProjectCodeUpdater.cs b/Assets/AirConsole/ProjectCodeUpdater.cs
index eece6833..082bde0b 100644
--- a/Assets/AirConsole/ProjectCodeUpdater.cs
+++ b/Assets/AirConsole/ProjectCodeUpdater.cs
@@ -79,6 +79,13 @@ private static void ExecuteCodePackageImport() {
                 AssetDatabase.DeleteAsset("Assets/AirConsole/unity-webview");
             }
 
+            // Up to 2.6.3, the code package also installed the plugin tests. They compile against internal plugin members, and
+            // ImportPackage never deletes files, so a stale copy would break compilation after a later release changes those members.
+            if (File.Exists(Path.Combine(Application.dataPath, "AirConsole", "scripts", "Tests", "EditMode",
+                    "AirConsole.EditMode.Tests.asmdef"))) {
+                AssetDatabase.DeleteAsset("Assets/AirConsole/scripts/Tests");
+            }
+
             ClearConsole();
             SessionState.SetBool(IMPORT_PENDING_KEY, true);
 #if UNITY_6000_6_OR_NEWER
diff --git a/Assets/Packager/Editor/Packager.cs b/Assets/Packager/Editor/Packager.cs
index 83022fb2..b5e6805c 100644
--- a/Assets/Packager/Editor/Packager.cs
+++ b/Assets/Packager/Editor/Packager.cs
@@ -148,17 +148,23 @@ private static void CollectWebGlTemplateFiles(string path, ref IEnumerable<strin
         private static string PackageCode() {
             string unityPackagePath = ProjectCodeUpdater.CodePackagePath;
 
+            // The plugin tests stay in this repository. They change PlayerSettings, so they must not run in game projects.
+            string[] codePaths = Directory.GetDirectories(Path.Combine(Application.dataPath, "AirConsole", "scripts"))
+                .Select(Path.GetFileName)
+                .Where(it => it != "Tests")
+                .Select(it => $"Assets/AirConsole/scripts/{it}")
+                .Append("Assets/AirConsole/unity-webview")
+                .Append("Assets/AirConsole/examples")
+                .ToArray();
+
 #if UNITY_6000_6_OR_NEWER
             UnityEditor.AssetPackage.Package.Export(new UnityEditor.AssetPackage.ExportPackageParameters(
-                new[] { "Assets/AirConsole/scripts", "Assets/AirConsole/unity-webview", "Assets/AirConsole/examples" },
+                codePaths,
                 unityPackagePath,
                 "",
                 ExportPackageOptions.Recurse));
 #else
-            AssetDatabase.ExportPackage(
-                new[] { "Assets/AirConsole/scripts", "Assets/AirConsole/unity-webview", "Assets/AirConsole/examples" },
-                unityPackagePath,
-                ExportPackageOptions.Recurse);
+            AssetDatabase.ExportPackage(codePaths, unityPackagePath, ExportPackageOptions.Recurse);
 #endif
             return unityPackagePath.Replace(Application.dataPath, "Assets");
         }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1e80767..2ee1a829 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,10 @@ Release notes follow the [keep a changelog](https://keepachangelog.com/en/1.1.0/
 
 - **Unity API:** `RequestPhotonEngineAuth` and the `OnPhotonEngineAuth` event provide a ticket for Photon Custom Authentication. Requires airconsole-api 1.12.0.
 
+### Changed
+
+- **Package:** The plugin package no longer contains the plugin tests (`Assets/AirConsole/scripts/Tests`), so they do not run in game projects. The upgrade deletes `Assets/AirConsole/scripts/Tests` that an earlier version installed.
+
 ## [2.6.3] - 2026-10-03
 
 ### Fixed