diff --git a/bin/test_executenode.py b/bin/test_executenode.py
index e260182..6ece414 100644
--- a/bin/test_executenode.py
+++ b/bin/test_executenode.py
@@ -4,6 +4,7 @@ import unittest
 from zfs_autobackup import *
 
 import subprocess
+import time
 
 print("THIS TEST REQUIRES SSH TO LOCALHOST")
 
@@ -15,8 +16,8 @@ class TestExecuteNode(unittest.TestCase):
 
     def basics(self, node ):
 
-        #single line with spaces
-        self.assertEqual(node.run(["echo","test test"]), ["test test"])
+        #single line 
+        self.assertEqual(node.run(["echo","test"]), ["test"])
 
         #error exit code
         with self.assertRaises(subprocess.CalledProcessError):
@@ -24,18 +25,26 @@ class TestExecuteNode(unittest.TestCase):
 
         #multiline without tabsplit
         self.assertEqual(node.run(["echo","l1c1\tl1c2\nl2c1\tl2c2"], tab_split=False), ["l1c1\tl1c2", "l2c1\tl2c2"])
-        # self.assertEqual(node.run(["echo","l1\nl2"]), ["l1", "l2"])
 
         #multiline tabsplit
         self.assertEqual(node.run(["echo","l1c1\tl1c2\nl2c1\tl2c2"], tab_split=True), [['l1c1', 'l1c2'], ['l2c1', 'l2c2']])
 
-
-        #escaping (shouldnt be a problem locally, single quotes can be a problem remote via ssh)
-        s="><`'\"@&$()$bla\\//.*!#test"
+        #escaping test (shouldnt be a problem locally, single quotes can be a problem remote via ssh)
+        s="><`'\"@&$()$bla\\/.*!#test _+-={}[]|"
         self.assertEqual(node.run(["echo",s]), [s])
 
-        #return std err
-        # self.assertEqual(node.run(["echo","test test"], return_stderr=True), ["test test"])
+        #return std err as well, trigger stderr by listing something non existing
+        (stdout, stderr)=node.run(["ls", "nonexistingfile"], return_stderr=True, valid_exitcodes=[2])
+        self.assertEqual(stdout,[])
+        self.assertRegex(stderr[0],"nonexistingfile")
+
+        #slow command, make sure things dont exit too early
+        start_time=time.time()
+        node.run(["sleep","1"])
+        self.assertGreaterEqual(time.time()-start_time,1)
+
+        #input a string and check it via cat
+        self.assertEqual(node.run(["cat"], input="test"), ["test"])
 
 
     def test_basicslocal(self):
@@ -47,17 +56,6 @@ class TestExecuteNode(unittest.TestCase):
         self.basics(node)
 
 
-    # def test_remoteecho(self):
-    #     node=ExecuteNode(ssh_to="localhost", debug_output=True)
-    #     self.assertEqual(node.run(["echo","test"]), ["test"])
-
-    # def test_exitlocal(self):
-    #     node=ExecuteNode(debug_output=True)
-
-    # def test_exitremote(self):
-    #     node=ExecuteNode(ssh_to="localhost", debug_output=True)
-    #     with self.assertRaises(subprocess.CalledProcessError):
-    #         self.remote1.run(["false"])
 
 
 
diff --git a/bin/zfs-autobackup b/bin/zfs-autobackup
index 5a47a0e..a605c59 100755
--- a/bin/zfs-autobackup
+++ b/bin/zfs-autobackup
@@ -378,7 +378,10 @@ class ExecuteNode:
 
         #Note: make streaming?
         if isinstance(input,str) or type(input)=='unicode':
-            p.stdin.write(input)
+            p.stdin.write(input.encode('utf-8'))
+
+        if p.stdin:
+            p.stdin.close()
 
         #return pipe
         if pipe: