diff --git a/pyomo/contrib/solver/tests/solvers/test_ipopt.py b/pyomo/contrib/solver/tests/solvers/test_ipopt.py
index 8e529928303..bb09b929815 100644
--- a/pyomo/contrib/solver/tests/solvers/test_ipopt.py
+++ b/pyomo/contrib/solver/tests/solvers/test_ipopt.py
@@ -12,12 +12,9 @@
 import stat
 import subprocess
 import sys
-import time
-import threading
 from contextlib import contextmanager
 
 import pyomo.environ as pyo
-from pyomo.common.envvar import is_windows
 from pyomo.common.fileutils import ExecutableData
 from pyomo.common.config import ConfigDict, ADVANCED_OPTION
 from pyomo.common.errors import ApplicationError, MouseTrap
@@ -1977,7 +1974,7 @@ def test_ipopt_timer_object(self):
         ipopt_instance = ipopt.Ipopt()
         results = ipopt_instance.solve(model)
         timing_info = results.timing_info
-        if ipopt_instance.version()[0:1] <= (3, 13):
+        if ipopt_instance.version()[:2] <= (3, 13):
             # We are running an older version of IPOPT (<= 3.13)
             self.assertIn('IPOPT (w/o function evaluations)', timing_info.keys())
             self.assertIn('NLP function evaluations', timing_info.keys())