diff --git a/contrib/jmh/src/mill/contrib/jmh/JmhModule.scala b/contrib/jmh/src/mill/contrib/jmh/JmhModule.scala
index a9d9efd1850..56ad48ceb60 100644
--- a/contrib/jmh/src/mill/contrib/jmh/JmhModule.scala
+++ b/contrib/jmh/src/mill/contrib/jmh/JmhModule.scala
@@ -53,11 +53,14 @@ trait JmhModule extends JavaModule {
       val dest = T.ctx().dest
       val (sourcesDir, _) = generateBenchmarkSources()
       val sources = os.walk(sourcesDir).filter(os.isFile)
+
       os.proc(
-        "javac",
+        Jvm.jdkTool("javac"),
         sources.map(_.toString),
         "-cp",
-        (runClasspath() ++ generatorDeps()).map(_.path.toString).mkString(":"),
+        (runClasspath() ++ generatorDeps()).map(_.path.toString).mkString(
+          java.io.File.pathSeparator
+        ),
         "-d",
         dest
       ).call(dest)
@@ -80,7 +83,7 @@ trait JmhModule extends JavaModule {
       Jvm.runSubprocess(
         "org.openjdk.jmh.generators.bytecode.JmhBytecodeGenerator",
         (runClasspath() ++ generatorDeps()).map(_.path),
-        mainArgs = Array(
+        mainArgs = Seq(
           compile().classes.path.toString,
           sourcesDir.toString,
           resourcesDir.toString,
diff --git a/contrib/jmh/test/src/JmhModuleTest.scala b/contrib/jmh/test/src/JmhModuleTest.scala
index c75be55875a..e6abd52f5f4 100644
--- a/contrib/jmh/test/src/JmhModuleTest.scala
+++ b/contrib/jmh/test/src/JmhModuleTest.scala
@@ -34,17 +34,16 @@ object JmhModuleTest extends TestSuite {
 
   def tests = Tests {
     test("jmh") {
-      "detects benchmarks" - workspaceTest(jmh) { eval =>
+      "listJmhBenchmarks" - workspaceTest(jmh) { eval =>
         val paths = EvaluatorPaths.resolveDestPaths(eval.outPath, jmh.listJmhBenchmarks())
         val outFile = paths.dest / "benchmarks.out"
-        println(outFile)
         val Right((result, _)) = eval(jmh.listJmhBenchmarks("-o", outFile.toString))
         val expected = """Benchmarks:
                          |mill.contrib.jmh.Bench2.log
                          |mill.contrib.jmh.Bench2.sqrt
                          |mill.contrib.jmh.Bench1.measureShared
                          |mill.contrib.jmh.Bench1.measureUnshared""".stripMargin
-        val out = os.read.lines(outFile).map(_.trim).mkString("\n")
+        val out = os.read.lines(outFile).map(_.trim).mkString(System.lineSeparator())
         assert(out == expected)
       }
     }