diff --git a/Assets/VRM/Runtime/IO/VRMMtoonMaterialImporter.cs b/Assets/VRM/Runtime/IO/VRMMtoonMaterialImporter.cs
index 345c74da3..75470b3c5 100644
--- a/Assets/VRM/Runtime/IO/VRMMtoonMaterialImporter.cs
+++ b/Assets/VRM/Runtime/IO/VRMMtoonMaterialImporter.cs
@@ -97,7 +97,7 @@ namespace VRM
         public IEnumerable<(SubAssetKey, TextureImportParam)> EnumerateTexturesForMaterial(GltfParser parser, int i)
         {
             // mtoon
-            if (TryCreateParam(parser, i, out MaterialImportParam param))
+            if (!TryCreateParam(parser, i, out MaterialImportParam param))
             {
                 // unlit
                 if (!GltfUnlitMaterial.TryCreateParam(parser, i, out param))
diff --git a/Assets/VRM/Tests/MToonTest.cs b/Assets/VRM/Tests/MToonTest.cs
index 747e624b5..c2c651597 100644
--- a/Assets/VRM/Tests/MToonTest.cs
+++ b/Assets/VRM/Tests/MToonTest.cs
@@ -16,7 +16,7 @@ namespace VRM
                 filterMode = FilterMode.Bilinear,
             };
 
-            var textureManager = new TextureExporter(AssetTextureUtil.IsTextureEditorAsset );
+            var textureManager = new TextureExporter(AssetTextureUtil.IsTextureEditorAsset);
             var srcMaterial = new Material(Shader.Find("VRM/MToon"));
 
             var offset = new Vector2(0.3f, 0.2f);
@@ -35,5 +35,24 @@ namespace VRM
                 materialProperties = new System.Collections.Generic.List<glTF_VRM_Material> { vrmMaterial }
             });
         }
+
+        [Test]
+        public void MToonMaterialParamTest()
+        {
+            if (!VRMTestAssets.TryGetPath("Models/VRoid/VictoriaRubin/VictoriaRubin.vrm", out string path))
+            {
+                return;
+            }
+
+            var parser = new GltfParser();
+            parser.ParsePath(path);
+
+            var importer = new VRMImporterContext(parser, null);
+
+            var materialImporter = new VRMMtoonMaterialImporter(importer.VRM);
+
+            Assert.AreEqual(73, parser.GLTF.materials.Count);
+            Assert.True(materialImporter.TryCreateParam(parser, 0, out MaterialImportParam param));
+        }
     }
 }
diff --git a/Assets/VRM/Tests/VRM.Tests.asmdef b/Assets/VRM/Tests/VRM.Tests.asmdef
index f7e300683..92d27823b 100644
--- a/Assets/VRM/Tests/VRM.Tests.asmdef
+++ b/Assets/VRM/Tests/VRM.Tests.asmdef
@@ -3,6 +3,7 @@
     "references": [
         "VRM",
         "UniGLTF",
+        "UniGLTF.Editor",
         "MeshUtility",
         "MeshUtility.Editor",
         "VRMShaders.GLTF.IO.Runtime",
diff --git a/Assets/VRM/Tests/VRMTestAssets.cs b/Assets/VRM/Tests/VRMTestAssets.cs
new file mode 100644
index 000000000..807abe90b
--- /dev/null
+++ b/Assets/VRM/Tests/VRMTestAssets.cs
@@ -0,0 +1,30 @@
+using System.IO;
+
+namespace VRM
+{
+    public static class VRMTestAssets
+    {
+        public static bool TryGetPath(string relative, out string path)
+        {
+            var env = System.Environment.GetEnvironmentVariable("VRM_TEST_MODELS");
+            if (string.IsNullOrEmpty(env))
+            {
+                path = default;
+                return false;
+            }
+            var root = new DirectoryInfo(env);
+            if (!root.Exists)
+            {
+                path = default;
+                return false;
+            }
+
+            path = Path.Combine(root.FullName, relative);
+            if (!File.Exists(path))
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/Assets/VRM/Tests/VRMTestAssets.cs.meta b/Assets/VRM/Tests/VRMTestAssets.cs.meta
new file mode 100644
index 000000000..e5a4274dc
--- /dev/null
+++ b/Assets/VRM/Tests/VRMTestAssets.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 983946c4f70cc494e87c8c8cf47d2589
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: