diff --git a/daemon/core/netns/vnodeclient.py b/daemon/core/netns/vnodeclient.py
index 114415e9..e597a009 100644
--- a/daemon/core/netns/vnodeclient.py
+++ b/daemon/core/netns/vnodeclient.py
@@ -7,6 +7,7 @@ by invoking the vcmd shell command.
 
 import os
 import stat
+import subprocess
 
 from core import constants
 from core.misc import log
@@ -17,8 +18,6 @@ USE_VCMD_MODULE = True
 
 if USE_VCMD_MODULE:
     import vcmd
-else:
-    import subprocess
 
 VCMD = os.path.join(constants.CORE_SBIN_DIR, "vcmd")
 
diff --git a/daemon/test.py b/daemon/test.py
index 9274613a..8981473a 100644
--- a/daemon/test.py
+++ b/daemon/test.py
@@ -5,5 +5,5 @@ pytest.main([
     "--cov-report",
     "xml",
     "--cov=.",
-    "tests/test_core.py"
+    "tests"
 ])
diff --git a/daemon/tests/test_core.py b/daemon/tests/test_core.py
index ab1d721e..07166ed3 100644
--- a/daemon/tests/test_core.py
+++ b/daemon/tests/test_core.py
@@ -10,11 +10,71 @@ from conftest import EMANE_SERVICES
 from core.enumerations import MessageFlags
 from core.mobility import BasicRangeModel
 from core.netns import nodes
+from core.netns import vnodeclient
 from core.phys.pnodes import PhysicalNode
 
 
 class TestCore:
 
+    def test_vnode_client(self, core):
+        """
+        Test vnode client methods.
+
+        :param conftest.Core core: core fixture to test with
+        """
+
+        # create ptp
+        ptp_node = core.session.add_object(cls=nodes.PtpNet)
+
+        # create nodes
+        core.create_node("n1")
+        core.create_node("n2")
+
+        # add interfaces
+        core.add_interface(ptp_node, "n1")
+        core.add_interface(ptp_node, "n2")
+
+        # get node client for testing
+        n1 = core.get_node("n1")
+        client = n1.vnodeclient
+
+        # instantiate session
+        core.session.instantiate()
+
+        # assert node directories created
+        core.assert_nodes()
+
+        # check we are connected
+        assert client.connected()
+
+        # check various command using vcmd module
+        command = ["ls"]
+        assert not client.cmd(command)
+        status, output = client.cmdresult(command)
+        assert not status
+        p, stdin, stdout, stderr = client.popen(command)
+        assert not p.status()
+        assert not client.icmd(command)
+        assert not client.redircmd(MagicMock(), MagicMock(), MagicMock(), command)
+        assert not client.shcmd(command[0])
+
+        # check various command using command line
+        vnodeclient.USE_VCMD_MODULE = False
+        assert not client.cmd(command)
+        status, output = client.cmdresult(command)
+        assert not status
+        p, stdin, stdout, stderr = client.popen(command)
+        assert not p.wait()
+        assert not client.icmd(command)
+        assert not client.shcmd(command[0])
+
+        # check module methods
+        assert vnodeclient.createclients(core.session.session_dir)
+
+        # check convenience methods for interface information
+        assert client.getaddr("eth0")
+        assert client.netifstats()
+
     def test_netif(self, core):
         """
         Test netif methods.
@@ -326,7 +386,7 @@ class TestCore:
         rtt_line = stdout.split("\n")[-1]
         rtt_values = rtt_line.split("=")[1].split("ms")[0].strip()
         rtt_avg = float(rtt_values.split("/")[2])
-        assert 0 <= rtt_avg <= 0.1
+        assert 0 <= rtt_avg <= 0.2
 
         # change delay in microseconds
         delay = 1000000