diff --git a/doc/en/reference/reference.rst b/doc/en/reference/reference.rst
index fc02d1675..3d7e5f0fa 100644
--- a/doc/en/reference/reference.rst
+++ b/doc/en/reference/reference.rst
@@ -1815,15 +1815,15 @@ All the command-line flags can be obtained by running ``pytest --help``::
                             expression. An expression is a python evaluatable
                             expression where all names are substring-matched
                             against test names and their parent classes.
-                            Example: -k 'test_method or test_other' matches all
+                            Example: -k "test_method or test_other" matches all
                             test functions and classes whose name contains
-                            'test_method' or 'test_other', while -k 'not
-                            test_method' matches those that don't contain
-                            'test_method' in their names. -k 'not test_method
-                            and not test_other' will eliminate the matches.
+                            "test_method" or "test_other", while -k "not
+                            test_method" matches those that don't contain
+                            "test_method" in their names. -k "not test_method
+                            and not test_other" will eliminate the matches.
                             Additionally keywords are matched to classes and
                             functions containing extra names in their
-                            'extra_keyword_matches' set, as well as functions
+                            "extra_keyword_matches" set, as well as functions
                             which have names assigned directly to them. The
                             matching is case-insensitive. For the default
                             windows terminal double quotes are preferred.