diff --git a/testing/test_doctest.py b/testing/test_doctest.py
index 67dc7fdbf..771cb52f3 100644
--- a/testing/test_doctest.py
+++ b/testing/test_doctest.py
@@ -114,7 +114,7 @@ class TestDoctests:
             >>> i + 1
             2
         """)
-        result = testdir.runpytest(p)
+        result = testdir.runpytest(p, "-s")
         result.stdout.fnmatch_lines([
             '001 >>> i = 0',
             '002 >>> i + 1',