Index: src/org/python/jsr223/PyScriptEngine.java
===================================================================
--- src/org/python/jsr223/PyScriptEngine.java	(revisão 7125)
+++ src/org/python/jsr223/PyScriptEngine.java	(cópia de trabalho)
@@ -100,7 +100,14 @@
             if (method == null) {
                 throw new NoSuchMethodException(name);
             }
-            return method.__call__(Py.javas2pys(args)).__tojava__(Object.class);
+
+            PyObject result;
+            if(args != null) {
+               result = method.__call__(Py.javas2pys(args));
+            } else {
+               result = method.__call__();
+            }
+            return result.__tojava__(Object.class);
         } catch (PyException pye) {
             throw scriptException(pye);
         }
Index: tests/java/org/python/jsr223/ScriptEngineTest.java
===================================================================
--- tests/java/org/python/jsr223/ScriptEngineTest.java	(revisão 7125)
+++ tests/java/org/python/jsr223/ScriptEngineTest.java	(cópia de trabalho)
@@ -172,12 +172,21 @@
 
         try {
             invocableEngine.invokeMethod("eggs", "undefined");
+	    fail("Expected a NoSuchMethodException" );
         } catch (NoSuchMethodException e) {
-            return;
+            assertEquals("undefined", e.getMessage());
         }
-        assertTrue("Expected a NoSuchMethodException", false);
     }
 
+    public void testInvokeMethodNoSuchArgs() throws ScriptException, NoSuchMethodException {
+        ScriptEngineManager manager = new ScriptEngineManager();
+        ScriptEngine pythonEngine = manager.getEngineByName("python");
+        Invocable invocableEngine = (Invocable)pythonEngine;
+
+	Object newStringCapitalize = invocableEngine.invokeMethod("'test'", "capitalize");
+	assertEquals(newStringCapitalize, "Test");
+    }
+
     public void testGetInterface() throws ScriptException, IOException {
         ScriptEngineManager manager = new ScriptEngineManager();
         ScriptEngine pythonEngine = manager.getEngineByName("python");