diff --git a/src/geometry.rs b/src/geometry.rs
index e6f4c6c..4597a75 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -51,6 +51,6 @@ mod tests {
     #[test]
     #[should_panic]
     fn foo() {
-        //panic!("This code panics!");
+        panic!("This code panics!");
     }
 }
diff --git a/tests/long_running_tests.rs b/tests/long_running_tests.rs
new file mode 100644
index 0000000..64de9cc
--- /dev/null
+++ b/tests/long_running_tests.rs
@@ -0,0 +1,2 @@
+#[test]
+fn very_long_running_test() {}