diff --git a/src/CompilingMatcher.php b/src/CompilingMatcher.php
index 45bce70a..aea1d3b9 100644
--- a/src/CompilingMatcher.php
+++ b/src/CompilingMatcher.php
@@ -64,7 +64,7 @@ public static function clear()
      * @phpstan-param Constraint::OP_*  $operator
      * @param string              $version
      *
-     * @return mixed
+     * @return bool
      */
     public static function match(ConstraintInterface $constraint, $operator, $version)
     {
diff --git a/tests/VersionParserTest.php b/tests/VersionParserTest.php
index 269a495a..b7856d94 100644
--- a/tests/VersionParserTest.php
+++ b/tests/VersionParserTest.php
@@ -197,7 +197,9 @@ public static function failingNormalizedVersions()
      */
     public function testNormalizeFailsAndReportsAliasIssue($fullInput)
     {
-        preg_match('{^([^,\s#]+)(?:#[^ ]+)? +as +([^,\s]+)$}', $fullInput, $match);
+        if (!preg_match('{^([^,\s#]+)(?:#[^ ]+)? +as +([^,\s]+)$}', $fullInput, $match)) {
+            $this->fail($fullInput.' did not match the regex');
+        }
         $parser = new VersionParser();
         $parser->normalize($match[1], $fullInput);
         try {
@@ -227,7 +229,9 @@ public static function failingNormalizedVersionsWithBadAlias()
      */
     public function testNormalizeFailsAndReportsAliaseeIssue($fullInput)
     {
-        preg_match('{^([^,\s#]+)(?:#[^ ]+)? +as +([^,\s]+)$}', $fullInput, $match);
+        if (!preg_match('{^([^,\s#]+)(?:#[^ ]+)? +as +([^,\s]+)$}', $fullInput, $match)) {
+            $this->fail($fullInput.' did not match the regex');
+        }
         $parser = new VersionParser();
         try {
             $parser->normalize($match[1], $fullInput);