diff --git a/pitest-entry/src/main/java/org/pitest/process/Java9Process.java b/pitest-entry/src/main/java/org/pitest/process/Java9Process.java
index abbcd5255..5f019c574 100644
--- a/pitest-entry/src/main/java/org/pitest/process/Java9Process.java
+++ b/pitest-entry/src/main/java/org/pitest/process/Java9Process.java
@@ -26,10 +26,6 @@ public class Java9Process implements WrappingProcess {
     private final Class<?>    minionClass;
     private JavaProcess       process;
 
-    private final long pid = ProcessHandle.current().pid();
-
-    private static int       counter = 0;
-
     public Java9Process(int port, ProcessArgs args, Class<?> minionClass) {
         this.port = port;
         this.processArgs = args;
@@ -124,12 +120,10 @@ private List<String> createLaunchArgs(JavaAgent agentJarLocator, List<String> ar
     }
 
     private Path createArgsFile(List<String> cmd) throws IOException {
-        // To avoid conflicts with running analysis, we use the PID as part of the file name
-        // To prevent conflicts between multiple threads counter is used
         // All files should be deleted on process exit, although some garbage may be left
         // if the process is killed. Files are however created in the system temp directory
         // so should be cleaned up on reboot
-        String name = "pitest-args-" + pid + "-" + nextCounter();
+        String name = "pitest-args-";
         Path args = Files.createTempFile(name, ".args");
         args.toFile().deleteOnExit();
         Files.write(args, cmd);
@@ -157,8 +151,4 @@ private static Predicate<String> isJavaAgentParam() {
         return a -> a.toLowerCase().startsWith("-javaagent");
     }
 
-    private static synchronized int nextCounter() {
-        return counter++;
-    }
-
 }