diff --git a/tests/FakerDotNet.Tests/Fakers/LoremFlickrFakerTests.cs b/tests/FakerDotNet.Tests/Fakers/LoremFlickrFakerTests.cs
index ea99710..41e6dd8 100644
--- a/tests/FakerDotNet.Tests/Fakers/LoremFlickrFakerTests.cs
+++ b/tests/FakerDotNet.Tests/Fakers/LoremFlickrFakerTests.cs
@@ -1,3 +1,4 @@
+using System;
 using FakeItEasy;
 using FakerDotNet.Fakers;
 using NUnit.Framework;
@@ -34,6 +35,15 @@ public void Image_returns_an_image_url_with_the_specified_size()
                 _loremflickrFaker.Image("50x60"));
         }
 
+        [Test]
+        public void Image_throws_ArgumentException_when_size_is_not_in_a_valid_format()
+        {
+            var ex = Assert.Throws<ArgumentException>(() =>
+                _loremflickrFaker.Image("ABCxDEF"));
+
+            Assert.That(ex.Message.StartsWith("Size should be specified in format 300x300"));
+        }
+
         [Test]
         public void Image_returns_an_image_url_with_the_specified_search_term()
         {