diff -r 5064a5c5b1a3 src/org/python/core/Py.java
--- a/src/org/python/core/Py.java	Mon Apr 13 23:17:20 2015 -0400
+++ b/src/org/python/core/Py.java	Tue Apr 14 09:33:36 2015 -0500
@@ -1533,10 +1533,14 @@
      * @return true if (we think) we are in an interactive environment
      */
     public static boolean isInteractive() {
+        // python.launcher.tty is authoratative; see http://bugs.jython.org/issue2325
         String isTTY = System.getProperty("python.launcher.tty");
         if (isTTY != null && isTTY.equals("true")) {
             return true;
         }
+        if (isTTY != null && isTTY.equals("false")) {
+            return false;
+        }
         // Decide if System.in is interactive
         try {
             POSIX posix = POSIXFactory.getPOSIX();
diff -r 5064a5c5b1a3 src/org/python/util/jython.java
--- a/src/org/python/util/jython.java	Mon Apr 13 23:17:20 2015 -0400
+++ b/src/org/python/util/jython.java	Tue Apr 14 09:33:36 2015 -0500
@@ -408,11 +408,16 @@
         if (opts.fixInteractive || (opts.filename == null && opts.command == null)) {
             // Go interactive with the console: the parser needs to know the encoding.
             String encoding = Py.getConsole().getEncoding();
-
             // Run the interpreter interactively
             try {
                 interp.cflags.encoding = encoding;
-                interp.interact(null, null);
+                if (!opts.interactive) {
+                    // Don't print prompts. http://bugs.jython.org/issue2325
+                    interp._interact(null, null);
+                }
+                else {
+                    interp.interact(null, null);
+                }
             } catch (Throwable t) {
                 Py.printException(t);
             }