diff --git a/src/Tomlyn.Tests/ModelTests.cs b/src/Tomlyn.Tests/ModelTests.cs
index 8d2a6a2..17ee329 100644
--- a/src/Tomlyn.Tests/ModelTests.cs
+++ b/src/Tomlyn.Tests/ModelTests.cs
@@ -64,6 +64,31 @@ public static void TestBasic()
             Assert.AreEqual("yo", subTable["d"]);
         }
 
+        [Test]
+        public void TestShortDateKey()
+        {
+            var input = "2018-01-01=123";
+
+            var syntax = Toml.Parse(input);
+            Assert.False(syntax.HasErrors, "The document should not have any errors");
+
+            var model = syntax.ToModel();
+            Assert.True(model.ContainsKey("2018-01-01"));
+        }
+
+
+        [Test]
+        public void TestFullDateKey()
+        {
+            var input = "\"1987-07-05T17:45:00Z\"=123";
+
+            var syntax = Toml.Parse(input);
+            Assert.False(syntax.HasErrors, "The document should not have any errors");
+
+            var model = syntax.ToModel();
+            Assert.True(model.ContainsKey("1987-07-05T17:45:00Z"));
+        }
+
         [Test]
         public static void TestTable()
         {