diff --git a/tox.ini b/tox.ini
index 3668058c3..ec04035f5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ passenv =
     GCS_TEST_FILE_URI
     GCS_PROJECT_ID
 commands =
-    py.test --cov=scrapy --cov-report= {posargs:docs scrapy tests}
+    py.test --cov=scrapy --cov-report= {posargs:--durations=10 docs scrapy tests}
 
 [testenv:py35]
 basepython = python3.5
@@ -60,7 +60,7 @@ basepython = python3.8
 [testenv:pypy3]
 basepython = pypy3
 commands =
-    py.test {posargs:docs scrapy tests}
+    py.test {posargs:--durations=10 docs scrapy tests}
 
 [testenv:flake8]
 basepython = python3.8