diff --git a/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs b/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs
new file mode 100644
index 000000000..5d0556954
--- /dev/null
+++ b/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs
@@ -0,0 +1,38 @@
+using NUnit.Framework;
+
+namespace UniJSON
+{
+    public class SerializeWithSchemaTests
+    {
+        [JsonSchema(Title="CheckConstraintsTest")]
+        public class CheckConstraintsTest
+        {
+            [JsonSchema(Minimum = 0)]
+            public int X;
+
+            [JsonSchema(Minimum = 10)] // Not required, thus ignored when the value violates the constraints
+            public int Y;
+        }
+
+        [Test]
+        public void TestCheckConstraints()
+        {
+            var obj = new CheckConstraintsTest()
+            {
+                X = 0,
+                Y = 0, // Will be excluded because 0 doesn't satisfy a requirement of "Minimum = 10"
+            };
+
+            var s = JsonSchema.FromType<CheckConstraintsTest>();
+            {
+                var c = new JsonSchemaValidationContext(obj);
+                Assert.Null(s.Validator.Validate(c, s));
+            }
+            var actual = s.Serialize(obj);
+
+            var expected = @"{""X"":0}";
+
+            Assert.AreEqual(expected, actual);
+        }
+    }
+}
diff --git a/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs.meta b/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs.meta
new file mode 100644
index 000000000..b0c9e7173
--- /dev/null
+++ b/Assets/VRM/UniJSON/Editor/Tests/Json/SerializeWithSchemaTests.cs.meta
@@ -0,0 +1,12 @@
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