diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index 31f3e8c90..ea3850566 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -86,7 +86,7 @@ def pytest_addoption(parser: Parser) -> None:
         "-W",
         "--pythonwarnings",
         action="append",
-        help="set which warnings to report, see -W option of python itself.",
+        help="set which warnings to report, see -W option of Python itself.",
     )
     parser.addini(
         "filterwarnings",
@@ -154,7 +154,7 @@ def pytest_addoption(parser: Parser) -> None:
     group.addoption(
         "--pyargs",
         action="store_true",
-        help="try to interpret all arguments as python packages.",
+        help="try to interpret all arguments as Python packages.",
     )
     group.addoption(
         "--ignore",
diff --git a/src/_pytest/mark/__init__.py b/src/_pytest/mark/__init__.py
index 11e6e34d7..aac65dca3 100644
--- a/src/_pytest/mark/__init__.py
+++ b/src/_pytest/mark/__init__.py
@@ -77,7 +77,7 @@ def pytest_addoption(parser: Parser) -> None:
         default="",
         metavar="EXPRESSION",
         help="only run tests which match the given substring expression. "
-        "An expression is a python evaluatable 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 test functions and classes whose name "