diff --git a/tests/Argu.Tests/Tests.fs b/tests/Argu.Tests/Tests.fs
index c3416877..88fc1a7f 100644
--- a/tests/Argu.Tests/Tests.fs
+++ b/tests/Argu.Tests/Tests.fs
@@ -871,7 +871,8 @@ module ``Argu Tests Main List`` =
     let ``Required subcommand attribute should fail on missing subcommand and display usage of subcommand and not main command`` () =
         let args = [|"--mandatory-arg" ; "true" ;  "multiple-mandatories" ; "--valuea"; "5"|]
         raisesWith<ArguParseException> <@ parser.ParseCommandLine(args) @>
-                                        (fun e -> <@ e.Message.Contains $"USAGE: {parser.ProgramName} multiple-mandatories [--help] --valuea <int>" @>)
+                                        (fun e -> <@ e.FirstLine.Contains "ERROR: missing parameter '--valueb', '--valuec'"
+                                                      && e.Message.Contains $"USAGE: {parser.ProgramName} multiple-mandatories [--help] --valuea <int>" @>)
 
     [<HelpFlags("--my-help")>]
     [<HelpDescription("waka jawaka")>]