1 files changed, 5 insertions, 0 deletions
diff --git a/tests/test_process.py b/tests/test_process.py
index 2cabe0b9..9d4aa56e 100644
--- a/tests/test_process.py
+++ b/tests/test_process.py
@@ -690,6 +690,11 @@ class ProcessTest(CoverageTest):
             import coverage
             print("No warnings!")
             """)
+
+        # Some of our testing infrastructure can issue warnings.
+        # Turn it all off for the sub-process.
+        self.del_environ("COVERAGE_TESTING")
+
         out = self.run_command("python allok.py")
         self.assertEqual(out, "No warnings!\n")