monotonic.monotonic() -> time.time()

setup.py

@@ -65,7 +65,6 @@ def main():
         "attrs>=17.4.0",
         "more-itertools>=4.0.0",
         "atomicwrites>=1.0",
-        "monotonic",
     ]
     # if _PYTEST_SETUP_SKIP_PLUGGY_DEP is set, skip installing pluggy;
     # used by tox.ini to test with pluggy master

src/_pytest/pytester.py

@@ -3,7 +3,6 @@ from __future__ import absolute_import, division, print_function
 
 import codecs
 import gc
-import monotonic
 import os
 import platform
 import re
@@ -1074,14 +1073,14 @@ class Testdir(object):
                 except subprocess.TimeoutExpired:
                     raise self.TimeoutExpired()
             else:
-                end = monotonic.monotonic() + timeout
+                end = time.time() + timeout
 
                 while True:
                     ret = popen.poll()
                     if ret is not None:
                         break
 
-                    remaining = end - monotonic.monotonic()
+                    remaining = end - time.time()
                     if remaining <= 0:
                         raise self.TimeoutExpired()