diff --git a/pytest_pspec/plugin.py b/pytest_pspec/plugin.py
index 43f9c7c..777c2d6 100644
--- a/pytest_pspec/plugin.py
+++ b/pytest_pspec/plugin.py
@@ -31,6 +31,9 @@ def pytest_configure(config):
 
 
 def pytest_collection_modifyitems(config, items):
+    if not config.option.pspec:
+        return
+    
     for item in items:
         node = item.obj
         parent = item.parent.obj
diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index 3dbb758..deea2b0 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -25,6 +25,17 @@ def test_a_feature_is_working():
         expected = '\033[92m ✓ a feature is working\033[0m'
         assert expected in result.stdout.str()
 
+    def test_should_not_modify_nodeid_when_disabled_test(self, testdir):
+        testdir.makepyfile("""
+            def test_a_feature_is_working():
+                assert True
+        """)
+
+        result = testdir.runpytest('-v')
+
+        expected = 'test_should_not_modify_nodeid_when_disabled_test.py::test_a_feature_is_working'
+        assert expected in result.stdout.str()
+
     def test_should_print_a_red_failing_test(self, testdir):
         testdir.makepyfile("""
             def test_a_failed_test_of_a_feature():