diff --git a/.gitignore b/.gitignore
index 92a9bbd..ea27d7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 vendor/
 workbench/
 .phpunit.result.cache
+.phpunit.cache/
+coverage.xml
diff --git a/phpunit.xml b/phpunit.xml
index dd49387..8ba5871 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,16 +1,27 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-     xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
-     bootstrap="vendor/autoload.php"
-     colors="true"
-     stopOnFailure="true"
->
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.6/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         cacheResultFile=".phpunit.cache/test-results"
+         executionOrder="depends,defects"
+         forceCoversAnnotation="true"
+         beStrictAboutCoversAnnotation="false"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTodoAnnotatedTests="true"
+         convertDeprecationsToExceptions="true"
+         failOnRisky="false"
+         failOnWarning="true"
+         verbose="true">
     <testsuites>
-        <testsuite name="Unit">
+        <testsuite name="default">
             <directory>tests</directory>
         </testsuite>
     </testsuites>
-    <php>
-        <const name="PHPUNIT_RUNNING" value="true"/>
-    </php>
+
+    <coverage cacheDirectory=".phpunit.cache/code-coverage"
+              processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
 </phpunit>
diff --git a/src/BprofLib.php b/src/BprofLib.php
index 649bb5b..8ccc95a 100755
--- a/src/BprofLib.php
+++ b/src/BprofLib.php
@@ -161,18 +161,15 @@ public function computeExclusiveMetrics(array $perfdata, array &$symbolTab, arra
         }
     }
 
+
     /**
-     * Compute inclusive metrics for function. This code was factored out
-     * of bprof_compute_flat_info().
+     * Computes the inclusive times and call count for each function in the given performance data.
      *
-     * The raw data contains inclusive metrics of a function for each
-     * unique parent function it is called from. The total inclusive metrics
-     * for a function is therefore the sum of inclusive metrics for the
-     * function across all parents.
+     * @param array $perfdata The performance data containing parent-child relationships and metrics.
+     *
+     * @return array The computed inclusive times and call count for each function.
+     * @throws RuntimeException If the parent and child are the same.
      *
-     * @param array<string, array<string, numeric>> $perfdata bprof format raw profiler data.
-     * @return array<string, array<string, numeric>> Returns a map of function name to total (across all parents) inclusive metrics for the function.
-     * @covers BprofLib::computeInclusiveTimes
      */
     public function computeInclusiveTimes(array $perfdata): array
     {
diff --git a/tests/BprofLibTest.php b/tests/BprofLibTest.php
index 3d6d14c..24d652c 100644
--- a/tests/BprofLibTest.php
+++ b/tests/BprofLibTest.php
@@ -7,6 +7,7 @@
 
 /**
  * Tests for BprofLib class.
+ * @coversDefaultClass \Nexelity\Bprof\BprofLib
  */
 class BprofLibTest extends TestCase
 {
@@ -24,7 +25,7 @@ protected function setUp(): void
     /**
      * Tests initMetrics method.
      * Asserts if metrics are initialized properly, without any errors.
-     * @covers BprofLib::initMetrics
+     * @covers ::initMetrics
      */
     public function testInitMetrics(): void
     {
@@ -52,7 +53,7 @@ public function testInitMetrics(): void
     /**
      * Tests getPossibleMetrics methods.
      * Asserts if method returns expected possible metrics.
-     * @covers BprofLib::getPossibleMetrics
+     * @covers ::getPossibleMetrics
      */
     public function testGetPossibleMetrics(): void
     {
@@ -71,7 +72,7 @@ public function testGetPossibleMetrics(): void
     /**
      * Test to confirm that the getMetrics method
      * in BprofLib returns the correct metric array
-     * @covers BprofLib::getMetrics
+     * @covers ::getMetrics
      */
     public function testGetMetrics(): void
     {
@@ -106,7 +107,7 @@ public function testGetMetrics(): void
     }
 
     /**
-     * @covers BprofLib::parseParentChild
+     * @covers ::parseParentChild
      */
     public function testParseParentChild(): void
     {
@@ -122,7 +123,7 @@ public function testParseParentChild(): void
     }
 
     /**
-     * @covers BprofLib::computeFlatInfo
+     * @covers ::computeFlatInfo
      */
     public function testComputeFlatInfo()
     {
@@ -176,6 +177,7 @@ public function testComputeFlatInfo()
      * 2. when a function call is part of the parent function but the parent function is not in the symbol table
      * 3. when a function call is part of the parent function and the parent function is also in the symbol table
      * 4. when a function call itself is the parent function
+     * @covers ::computeExclusiveMetrics
      */
     public function testComputeExclusiveMetrics(): void
     {
@@ -208,6 +210,10 @@ public function testComputeExclusiveMetrics(): void
     }
 
 
+    /**
+     * @return void
+     * @covers ::computeInclusiveTimes
+     */
     public function testComputeInclusiveTimes(): void
     {
         $perfData = [
diff --git a/tests/PerfDataTest.php b/tests/PerfDataTest.php
index c2755e7..620918b 100644
--- a/tests/PerfDataTest.php
+++ b/tests/PerfDataTest.php
@@ -21,6 +21,10 @@ protected function setUp(): void
         $this->cast = new PerfData();
     }
 
+    /**
+     * @return void
+     * @covers \Nexelity\Bprof\Casts\PerfData::get
+     */
     #[Test]
     public function testGet(): void
     {
@@ -34,6 +38,10 @@ public function testGet(): void
         $this->assertEquals(['foo' => 'bar'], $result);
     }
 
+    /**
+     * @return void
+     * @covers \Nexelity\Bprof\Casts\PerfData::get
+     */
     #[Test]
     public function testGetNullValue(): void
     {
@@ -43,6 +51,10 @@ public function testGetNullValue(): void
         $this->cast->get($trace, '', null, []);
     }
 
+    /**
+     * @return void
+     * @covers \Nexelity\Bprof\Casts\PerfData::get
+     */
     #[Test]
     public function testGetUnzippedFailure(): void
     {