diff --git a/identity-server/src/IdentityServer/Extensions/StringsExtensions.cs b/identity-server/src/IdentityServer/Extensions/StringsExtensions.cs
index 268d16869..c86503186 100644
--- a/identity-server/src/IdentityServer/Extensions/StringsExtensions.cs
+++ b/identity-server/src/IdentityServer/Extensions/StringsExtensions.cs
@@ -207,16 +207,9 @@ public static bool IsUri(this string input)
             return false;
         }
 
-        if (uri.IsFile)
-        {
-            // no need to check if input starts with {Uri.UriSchemeFile}:// because uri.IsFile ensures it is either '/' or `file://`
-            if (!input.StartsWith(Uri.UriSchemeFile, StringComparison.OrdinalIgnoreCase))
-            {
-                return false;
-            }
-        }
-
-        return true;
+        return !uri.IsFile ||
+               // no need to check if input starts with {Uri.UriSchemeFile}:// because uri.IsFile ensures it is either '/' or `file://`
+               input.StartsWith(Uri.UriSchemeFile, StringComparison.OrdinalIgnoreCase);
     }
 
     [DebuggerStepThrough]