diff --git a/docs/usage.rst b/docs/usage.rst
index 73b00ea..f186d55 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -30,4 +30,6 @@ to estimate Pi with a Monte Carlo method.
         )
         return 4.0 * sum(inside_samples) / iterations
 
+>>> random.seed(1)
 >>> pi(1000)
+3.112
diff --git a/pyproject.toml b/pyproject.toml
index 23d0b68..573cbfa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,7 +70,6 @@ addopts = '''
     --cov-fail-under=100
     --cov-report term-missing
     --cov-report xml
-    --ignore=docs/
 '''