diff --git a/Plugins/PackageToJS/Sources/PackageToJS.swift b/Plugins/PackageToJS/Sources/PackageToJS.swift
index 1949527d..80934c24 100644
--- a/Plugins/PackageToJS/Sources/PackageToJS.swift
+++ b/Plugins/PackageToJS/Sources/PackageToJS.swift
@@ -38,6 +38,8 @@ struct PackageToJS {
         var environment: String?
         /// Whether to run tests in the browser with inspector enabled
         var inspect: Bool
+        /// The extra arguments to pass to node
+        var extraNodeArguments: [String]
         /// The options for packaging
         var packageOptions: PackageOptions
     }
@@ -82,7 +84,8 @@ struct PackageToJS {
 
             try PackageToJS.runSingleTestingLibrary(
                 testRunner: testRunner, currentDirectoryURL: currentDirectoryURL,
-                extraArguments: extraArguments
+                extraArguments: extraArguments,
+                testOptions: testOptions
             )
         }
         let swiftTestingCoverageFile = outputDir.appending(path: "SwiftTesting.profraw")
@@ -97,7 +100,8 @@ struct PackageToJS {
 
             try PackageToJS.runSingleTestingLibrary(
                 testRunner: testRunner, currentDirectoryURL: currentDirectoryURL,
-                extraArguments: extraArguments
+                extraArguments: extraArguments,
+                testOptions: testOptions
             )
         }
 
@@ -114,10 +118,11 @@ struct PackageToJS {
     static func runSingleTestingLibrary(
         testRunner: URL,
         currentDirectoryURL: URL,
-        extraArguments: [String]
+        extraArguments: [String],
+        testOptions: TestOptions
     ) throws {
         let node = try which("node")
-        let arguments = ["--experimental-wasi-unstable-preview1", testRunner.path] + extraArguments
+        let arguments = ["--experimental-wasi-unstable-preview1"] + testOptions.extraNodeArguments + [testRunner.path] + extraArguments
         print("Running test...")
         logCommandExecution(node.path, arguments)
 
diff --git a/Plugins/PackageToJS/Sources/PackageToJSPlugin.swift b/Plugins/PackageToJS/Sources/PackageToJSPlugin.swift
index 49e60fce..96102376 100644
--- a/Plugins/PackageToJS/Sources/PackageToJSPlugin.swift
+++ b/Plugins/PackageToJS/Sources/PackageToJSPlugin.swift
@@ -340,10 +340,13 @@ extension PackageToJS.TestOptions {
         let prelude = extractor.extractOption(named: "prelude").last
         let environment = extractor.extractOption(named: "environment").last
         let inspect = extractor.extractFlag(named: "inspect")
+        let extraNodeArguments = extractor.extractSingleDashOption(named: "Xnode")
         let packageOptions = PackageToJS.PackageOptions.parse(from: &extractor)
         var options = PackageToJS.TestOptions(
             buildOnly: buildOnly != 0, listTests: listTests != 0,
-            filter: filter, prelude: prelude, environment: environment, inspect: inspect != 0, packageOptions: packageOptions
+            filter: filter, prelude: prelude, environment: environment, inspect: inspect != 0,
+            extraNodeArguments: extraNodeArguments,
+            packageOptions: packageOptions
         )
 
         if !options.buildOnly, !options.packageOptions.useCDN {
@@ -379,6 +382,39 @@ extension PackageToJS.TestOptions {
 
 // MARK: - PackagePlugin helpers
 
+extension ArgumentExtractor {
+  fileprivate mutating func extractSingleDashOption(named name: String) -> [String] {
+    let parts = remainingArguments.split(separator: "--", maxSplits: 1, omittingEmptySubsequences: false)
+    var args = Array(parts[0])
+    let literals = Array(parts.count == 2 ? parts[1] : [])
+
+    var values: [String] = []
+    var idx = 0
+    while idx < args.count {
+      var arg = args[idx]
+      if arg == "-\(name)" {
+        args.remove(at: idx)
+        if idx < args.count {
+          let val = args[idx]
+          values.append(val)
+          args.remove(at: idx)
+        }
+      }
+      else if arg.starts(with: "-\(name)=") {
+        args.remove(at: idx)
+        arg.removeFirst(2 + name.count)
+        values.append(arg)
+      }
+      else {
+        idx += 1
+      }
+    }
+
+    self = ArgumentExtractor(args + literals)
+    return values
+  }
+}
+
 /// Derive default product from the package
 /// - Returns: The name of the product to build
 /// - Throws: `PackageToJSError` if there's no executable product or if there's more than one
diff --git a/Plugins/PackageToJS/Tests/ExampleTests.swift b/Plugins/PackageToJS/Tests/ExampleTests.swift
index 743504e3..53048e00 100644
--- a/Plugins/PackageToJS/Tests/ExampleTests.swift
+++ b/Plugins/PackageToJS/Tests/ExampleTests.swift
@@ -148,6 +148,20 @@ extension Trait where Self == ConditionTrait {
         let swiftSDKID = try #require(Self.getSwiftSDKID())
         try withPackage(at: "Examples/Testing") { packageDir, runSwift in
             try runSwift(["package", "--swift-sdk", swiftSDKID, "js", "test"], [:])
+            try withTemporaryDirectory(body: { tempDir, _ in
+                let scriptContent = """
+                const fs = require('fs');
+                const path = require('path');
+                const scriptPath = path.join(__dirname, 'test.txt');
+                fs.writeFileSync(scriptPath, 'Hello, world!');
+                """
+                try scriptContent.write(to: tempDir.appending(path: "script.js"), atomically: true, encoding: .utf8)
+                let scriptPath = tempDir.appending(path: "script.js")
+                try runSwift(["package", "--swift-sdk", swiftSDKID, "js", "test", "-Xnode=--require=\(scriptPath.path)"], [:])
+                let testPath = tempDir.appending(path: "test.txt")
+                try #require(FileManager.default.fileExists(atPath: testPath.path), "test.txt should exist")
+                try #require(try String(contentsOf: testPath, encoding: .utf8) == "Hello, world!", "test.txt should be created by the script")
+            })
             try runSwift(["package", "--swift-sdk", swiftSDKID, "js", "test", "--environment", "browser"], [:])
         }
     }