diff --git a/tests/issue-18/hooks.md b/tests/issue-18/hooks.md
index 270c081..a72a3c2 100644
--- a/tests/issue-18/hooks.md
+++ b/tests/issue-18/hooks.md
@@ -11,16 +11,14 @@
 
 ### `some_condition_filter`
 
-*Test issue 18.*
-
 **Arguments**
 
 Argument | Type | Description
 -------- | ---- | -----------
-`$some_condition` | `bool` | Condition.
-`$some_other_parameter` | `mixed` | Other parameter.
+`$some_condition` |  | 
+`$some_other_parameter` |  | 
 
-Source: [tests/issue-18/test-issue-18.php](test-issue-18.php), [line 11](test-issue-18.php#L11-L19)
+Source: [tests/issue-18/test-issue-18.php](test-issue-18.php), [line 19](test-issue-18.php#L19-L19)
 
 
 <p align="center"><a href="https://github.com/pronamic/wp-documentor"><img src="https://cdn.jsdelivr.net/gh/pronamic/wp-documentor@main/logos/pronamic-wp-documentor.svgo-min.svg" alt="Pronamic WordPress Documentor" width="32" height="32"></a><br><em>Generated by <a href="https://github.com/pronamic/wp-documentor">Pronamic WordPress Documentor</a> <code>1.2.0</code></em><p>
diff --git a/tests/issue-18/test-issue-18.php b/tests/issue-18/test-issue-18.php
index fbb8de5..bf76b58 100644
--- a/tests/issue-18/test-issue-18.php
+++ b/tests/issue-18/test-issue-18.php
@@ -16,6 +16,6 @@
  * @param mixed $some_other_parameter Other parameter.
  * @return bool
  */
-if ( apply_filters( 'some_condition_filter', $some_condition, $some_other_parameter ) ) {
+if ( (bool) apply_filters( 'some_condition_filter', $some_condition, $some_other_parameter ) ) {
     do_something();
 }