diff --git a/changelog/7040.improvement.rst b/changelog/7040.improvement.rst
new file mode 100644
index 000000000..267eac4c4
--- /dev/null
+++ b/changelog/7040.improvement.rst
@@ -0,0 +1 @@
+``-k`` no longer matches against the directory containing the test suite.
diff --git a/src/_pytest/mark/__init__.py b/src/_pytest/mark/__init__.py
index 134ed1876..fd003f68b 100644
--- a/src/_pytest/mark/__init__.py
+++ b/src/_pytest/mark/__init__.py
@@ -136,7 +136,7 @@ class KeywordMatcher:
         import pytest
 
         for item in item.listchain():
-            if not isinstance(item, pytest.Instance):
+            if not isinstance(item, (pytest.Instance, pytest.Session)):
                 mapped_names.add(item.name)
 
         # Add the names added as extra keywords to current or parent items