diff --git a/ReqIFSharp.Extensions.Tests/ReqIFExtensions/ExternalObjectExtensionsTestFixture.cs b/ReqIFSharp.Extensions.Tests/ReqIFExtensions/ExternalObjectExtensionsTestFixture.cs
index b2bccb0..fd2daab 100644
--- a/ReqIFSharp.Extensions.Tests/ReqIFExtensions/ExternalObjectExtensionsTestFixture.cs
+++ b/ReqIFSharp.Extensions.Tests/ReqIFExtensions/ExternalObjectExtensionsTestFixture.cs
@@ -79,7 +79,7 @@ public void Verify_that_CreateUrl_returns_expected_url()
             };
 
             var expectedBase64Uri = Convert.ToBase64String(Encoding.UTF8.GetBytes(externalObject.Uri));
-            var expectedUrl = $"/reqif/{header.Identifier}/externalobject/{expectedBase64Uri} ";
+            var expectedUrl = $"/reqif/{header.Identifier}/externalobject/{expectedBase64Uri}";
 
             Assert.That(externalObject.CreateUrl(), Is.EqualTo(expectedUrl));
         }
diff --git a/ReqIFSharp.Extensions/ReqIFExtensions/ExternalObjectExtensions.cs b/ReqIFSharp.Extensions/ReqIFExtensions/ExternalObjectExtensions.cs
index bee1bf9..c948489 100644
--- a/ReqIFSharp.Extensions/ReqIFExtensions/ExternalObjectExtensions.cs
+++ b/ReqIFSharp.Extensions/ReqIFExtensions/ExternalObjectExtensions.cs
@@ -48,7 +48,7 @@ public static string CreateUrl(this ExternalObject externalObject)
 
             var url = new StringBuilder();
             url.Append($"/reqif/{externalObject.Owner.SpecElAt.ReqIFContent.DocumentRoot.TheHeader.Identifier}");
-            url.Append($"/externalobject/{externalObject.Uri.Base64Encode()} ");
+            url.Append($"/externalobject/{externalObject.Uri.Base64Encode()}");
 
             return url.ToString();
         }