diff --git a/roles/pip/defaults/main.yml b/roles/pip/defaults/main.yml
index e688ea2..e3ae88a 100644
--- a/roles/pip/defaults/main.yml
+++ b/roles/pip/defaults/main.yml
@@ -2,11 +2,9 @@
 # For Python 3, use python3-pip.
 pip_package_name: python3-pip
 pip_executable: "{{ 'pip3' if pip_package_name.startswith('python3') else 'pip' }}"
-pip_executable_extra_args: ~
+pip_executable_extra_args:
 pip_environment_variables: {}
-
 pip_packages: []
-
-pip_requirements_file: ~
+pip_requirements_file:
 pip_package_state: present
-pip_package_virtualenv: ~
+pip_package_virtualenv:
diff --git a/roles/pip/tasks/main.yml b/roles/pip/tasks/main.yml
index 2298b6b..fb72c24 100644
--- a/roles/pip/tasks/main.yml
+++ b/roles/pip/tasks/main.yml
@@ -22,5 +22,5 @@
     state: "{{ pip_package_state | default(omit) }}"
     executable: "{{ pip_executable }}"
     extra_args: "{{ pip_executable_extra_args | default(omit) }}"
-  when: "pip_requirements_file"
+  when: pip_requirements_file
   environment: "{{ pip_environment_variables }}"