@@ -41,15 +41,15 @@ BeforeAll {
         $preamble += "`$env:$k = '$vEsc'; "
       }
     }
-    # Splat the args as a child-side ARRAY so tokens like -Version / -Help bind
-    # as parameter names. Passing them as quoted literals in a call expression
-    # would instead bind them positionally as string VALUES (e.g. $Version would
-    # become "-Version"); array splatting preserves command-line param parsing.
-    $parts = @()
-    foreach ($a in $ScriptArgs) { $parts += "'" + $a.Replace($sq, $escSq) + "'" }
-    $argArray = $parts -join ","
+    # Pass the script args as bareword command-line tokens (e.g. `-Version
+    # 0.0.0-nonexistent`) so parameter NAMES bind as names - matching the
+    # original `pwsh -File <script> @ScriptArgs` semantics. Quoting them as
+    # literals (or array-splatting) binds positionally instead, so $Version
+    # would receive the literal string "-Version". The harness only ever passes
+    # shell-safe tokens (-Help, -Version, version strings; no spaces/quotes).
+    $argTokens = $ScriptArgs -join " "
     $scriptEsc = $script:InstallScript.Replace($sq, $escSq)
-    $command = "$preamble `$__args = @($argArray); & '$scriptEsc' @__args"
+    $command = "$preamble & '$scriptEsc' $argTokens"
     $output = & pwsh -NoProfile -Command $command 2>&1 | Out-String
     return @{ Code = $LASTEXITCODE; Output = $output }
   }