diff --git a/tests/test-source-install.yml b/tests/test-source-install.yml
index 4de5f31..2c1fc64 100644
--- a/tests/test-source-install.yml
+++ b/tests/test-source-install.yml
@@ -4,6 +4,12 @@
   vars:
     certbot_install_from_source: yes
 
+  pre_tasks:
+    - name: Update apt cache.
+      apt: update_cache=yes cache_valid_time=600
+      when: ansible_os_family == 'Debian'
+      changed_when: false
+
   roles:
     - geerlingguy.git
     - role_under_test
diff --git a/tests/test.yml b/tests/test.yml
index 0ed0b43..8801ef8 100644
--- a/tests/test.yml
+++ b/tests/test.yml
@@ -1,4 +1,11 @@
 ---
 - hosts: all
+
+  pre_tasks:
+    - name: Update apt cache.
+      apt: update_cache=yes cache_valid_time=600
+      when: ansible_os_family == 'Debian'
+      changed_when: false
+
   roles:
     - role_under_test