diff --git a/doc-source/requirements.txt b/doc-source/requirements.txt
index 7fd0cf6..172d70e 100644
--- a/doc-source/requirements.txt
+++ b/doc-source/requirements.txt
@@ -2,7 +2,7 @@ git+https://github.com/sphinx-toolbox/sphinx-toolbox-experimental.git
 attr-utils>=0.8.0
 default-values>=0.6.0
 extras-require>=0.5.0
-furo>=2020.11.19b18
+furo==2021.06.18b36
 html-section>=0.3.0
 seed-intersphinx-mapping>=1.2.2
 sphinx>=3.0.3
diff --git a/formate.toml b/formate.toml
index e9cc57c..ec61be1 100644
--- a/formate.toml
+++ b/formate.toml
@@ -48,6 +48,7 @@ known_third_party = [
     "pytest",
     "pytest_cov",
     "pytest_randomly",
+    "pytest_rerunfailures",
     "pytest_timeout",
     "scipy",
     "sdjson",
diff --git a/tox.ini b/tox.ini
index e27f303..6c42df8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -202,4 +202,4 @@ package = libgunshotmatch
 
 [pytest]
 addopts = --color yes --durations 25
-timeout = 1000
+timeout = 300