diff --git a/bot/tests/conftest.py b/bot/tests/conftest.py
index 819eb0ac9..2b2ab9951 100644
--- a/bot/tests/conftest.py
+++ b/bot/tests/conftest.py
@@ -13,6 +13,7 @@
 import hglib
 import pytest
 import responses
+import tenacity
 
 FIXTURES_DIR = os.path.join(os.path.dirname(__file__), "fixtures")
 
@@ -405,3 +406,11 @@ def _sum(name):
         "linesMissed": _sum("linesMissed"),
         "linesTotal": _sum("linesTotal"),
     }
+
+
+@pytest.fixture
+def mock_tenacity(monkeypatch):
+    """
+    Mock Tenacity wait function to avoid spening time in unit tests
+    """
+    monkeypatch.setattr(tenacity, "wait_fixed", lambda x: None)
diff --git a/bot/tests/test_taskcluster.py b/bot/tests/test_taskcluster.py
index 7bcf9d2fa..0b5a88e5f 100644
--- a/bot/tests/test_taskcluster.py
+++ b/bot/tests/test_taskcluster.py
@@ -2,7 +2,6 @@
 
 import json
 import os
-from unittest import mock
 from zipfile import BadZipFile
 
 import pytest
@@ -256,8 +255,7 @@ def test_get_platform(task_name, expected):
     assert taskcluster.get_platform(task) == expected
 
 
-@mock.patch("time.sleep")
-def test_download_artifact_forbidden(mocked_sleep, mock_taskcluster, tmpdir):
+def test_download_artifact_forbidden(mock_taskcluster, tmpdir, mock_tenacity):
     responses.add(
         responses.GET,
         "https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FBdocjnAQOW_GJDOfmgjxw/artifacts/public%2Ftest_info%2Fcode-coverage-grcov.zip",
@@ -278,8 +276,7 @@ def test_download_artifact_forbidden(mocked_sleep, mock_taskcluster, tmpdir):
     assert len(responses.calls) == 5
 
 
-@mock.patch("time.sleep")
-def test_download_artifact_badzip(mocked_sleep, mock_taskcluster, tmpdir):
+def test_download_artifact_badzip(mock_taskcluster, tmpdir, mock_tenacity):
     responses.add(
         responses.GET,
         "https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FBdocjnAQOW_GJDOfmgjxw/artifacts/public%2Ftest_info%2Fcode-coverage-grcov.zip",