diff --git a/tox/interpreters.py b/tox/interpreters.py
index 029046d1fd..c13a503389 100644
--- a/tox/interpreters.py
+++ b/tox/interpreters.py
@@ -148,7 +148,7 @@ def tox_get_python_executable(envconfig):
         m = re.match(r"python(\d)\.(\d)", name)
         if m:
             # The standard names are in predictable places.
-            actual = r"c:\python{}{}\python.exe".format(m.groups())
+            actual = r"c:\python{}{}\python.exe".format(*m.groups())
         if not actual:
             actual = win32map.get(name, None)
         if actual:
diff --git a/tox/venv.py b/tox/venv.py
index 6bcbeadf8d..22695d9f76 100755
--- a/tox/venv.py
+++ b/tox/venv.py
@@ -25,7 +25,7 @@ def writeconfig(self, path):
         lines = [
             "{} {}".format(self.md5, self.python),
             "{} {:d} {:d} {:d}".format(
-                self.version, self.sitepackages, self.usedevelop, self.alwayscopyf
+                self.version, self.sitepackages, self.usedevelop, self.alwayscopy
             ),
         ]
         for dep in self.deps: