diff --git a/.editorconfig b/.editorconfig
index d337be3a2f..5fe5e57192 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -147,6 +147,9 @@ dotnet_diagnostic.IDE0018.severity = warning
 # Use pattern matching to avoid 'as' followed by a 'null' check.
 dotnet_diagnostic.IDE0019.severity = warning
 
+# Use pattern matching to avoid 'is' check followed by a cast.
+dotnet_diagnostic.IDE0020.severity = warning
+
 # Collection initialization can be simplified
 dotnet_diagnostic.IDE0028.severity = warning
 
diff --git a/OpenRA.Game/Scripting/ScriptTypes.cs b/OpenRA.Game/Scripting/ScriptTypes.cs
index bc71210388..26bfaabdff 100644
--- a/OpenRA.Game/Scripting/ScriptTypes.cs
+++ b/OpenRA.Game/Scripting/ScriptTypes.cs
@@ -176,9 +176,8 @@ namespace OpenRA.Scripting
 				return new LuaCustomClrObject(obj);
 			}
 
-			if (obj is Array)
+			if (obj is Array array)
 			{
-				var array = (Array)obj;
 				var i = 1;
 				var table = context.CreateTable();