diff --git a/.editorconfig b/.editorconfig
index 785caab..85d6fcc 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -26,5 +26,6 @@ fsharp_multi_line_lambda_closing_newline=true
 fsharp_experimental_keep_indent_in_branch=true
 fsharp_max_value_binding_width=80
 fsharp_max_record_width=0
+fsharp_bar_before_discriminated_union_declaration=true
 max_line_length=120
 end_of_line=lf
diff --git a/Raft.Test/ValidHistory.fs b/Raft.Test/ValidHistory.fs
index 7ddeed6..518b8d1 100644
--- a/Raft.Test/ValidHistory.fs
+++ b/Raft.Test/ValidHistory.fs
@@ -3,7 +3,7 @@ namespace Raft.Test
 open Raft
 open FsCheck
 
-type ValidHistory<'a> = ValidHistory of NetworkAction<'a> list
+type ValidHistory<'a> = | ValidHistory of NetworkAction<'a> list
 
 [<RequireQualifiedAccess>]
 module ValidHistory =