diff --git a/src/Platform/TargetPhp/PhpBinaryPath.php b/src/Platform/TargetPhp/PhpBinaryPath.php
index 9f4a5579..0025b3fa 100644
--- a/src/Platform/TargetPhp/PhpBinaryPath.php
+++ b/src/Platform/TargetPhp/PhpBinaryPath.php
@@ -422,12 +422,12 @@ private static function guessWithPhpConfig(self $phpBinaryPath): self
     private static function cleanWarningAndDeprecationsFromOutput(string $testOutput): string
     {
         // Note: xdebug can prefix `PHP ` onto warnings/deprecations, so filter them out too
-        return implode(
+        return trim(implode(
             "\n",
             array_filter(
                 explode("\n", $testOutput),
                 static fn (string $line) => ! preg_match('/^(Deprecated|Warning|PHP Warning|PHP Deprecated):/', $line),
             ),
-        );
+        ));
     }
 }
diff --git a/test/assets/valid-php-with-warnings.sh b/test/assets/valid-php-with-warnings.sh
index 9289f248..37d7c4af 100755
--- a/test/assets/valid-php-with-warnings.sh
+++ b/test/assets/valid-php-with-warnings.sh
@@ -2,7 +2,9 @@
 
 # These should be implicitly filtered out by PIE
 echo "PHP Warning:  PHP Startup: Unable to load dynamic library 'redis' (tried: /path/to/redis (dlopen(/path/to/redis, 0x0009): [...] in Unknown on line 0"
+echo "" # add some newlines...
 echo "Warning: PHP Startup: Unable to load dynamic library 'pdo_mysql' (tried: /path/to/pdo_mysql (/path/to/pdo_mysql: cannot open shared object file: No such file or directory), /path/to/pdo_mysql.so (/path/to/pdo_mysql.so: undefined symbol: mysqlnd_debug_std_no_trace_funcs)) in Unknown on line 0"
+echo " " # add some whitespace...
 echo "Deprecated: Function unsafe_function() is deprecated since 1.5, use safe_replacement() instead in example.php on line 9"
 echo "Deprecated: PHP Startup: session.sid_length INI setting is deprecated in Unknown on line 0"
 echo "PHP Deprecated:  PHP Startup: session.sid_length INI setting is deprecated in Unknown on line 0"