diff --git a/src/Symbol/SymbolRegistry.php b/src/Symbol/SymbolRegistry.php
index 84f3743e..107ff989 100644
--- a/src/Symbol/SymbolRegistry.php
+++ b/src/Symbol/SymbolRegistry.php
@@ -27,7 +27,6 @@
 use function Safe\preg_match;
 use function strtolower;
 use function trim;
-use const SORT_STRING;
 
 final class SymbolRegistry
 {
@@ -45,11 +44,8 @@ public static function create(
         array $regexes = []
     ): self {
         return new self(
-            array_map(
-                static fn (string $name) => strtolower(trim($name, '\\')),
-                $names,
-            ),
-            array_unique($regexes, SORT_STRING),
+            self::normalizeNames($names),
+            array_unique($regexes),
             false,
         );
     }
@@ -66,13 +62,8 @@ public static function createForConstants(
         array $regexes = []
     ): self {
         return new self(
-            array_map(
-                static fn (string $name) => self::lowerCaseConstantName(
-                    trim($name, '\\'),
-                ),
-                $names,
-            ),
-            array_unique($regexes, SORT_STRING),
+            self::normalizeConstantNames($names),
+            array_unique($regexes),
             true,
         );
     }
@@ -151,6 +142,31 @@ public function getRegexes(): array
         return $this->regexes;
     }
 
+    private static function normalizeNames(array $names): array
+    {
+        return array_map(
+            static fn (string $name) => strtolower(
+                self::normalizeName($name),
+            ),
+            $names,
+        );
+    }
+
+    private static function normalizeConstantNames(array $names): array
+    {
+        return array_map(
+            static fn (string $name) => self::lowerCaseConstantName(
+                self::normalizeName($name),
+            ),
+            $names,
+        );
+    }
+
+    private static function normalizeName(string $name): string
+    {
+        return trim($name, '\\ ');
+    }
+
     /**
      * Transforms the constant FQ name "Acme\Foo\X" to "acme\foo\X" since the
      * namespace remains case-insensitive for constants regardless of whether
diff --git a/tests/Symbol/SymbolRegistryTest.php b/tests/Symbol/SymbolRegistryTest.php
index 70fdc3e7..a5e74a29 100644
--- a/tests/Symbol/SymbolRegistryTest.php
+++ b/tests/Symbol/SymbolRegistryTest.php
@@ -125,7 +125,7 @@ public static function provideSymbols(): iterable
                 $expected,
             ];
 
-            yield '[(polluted) name only] '.$title => [
+            yield '[(polluted with leading backslash) name only] '.$title => [
                 $names,
                 [],
                 '\\'.$symbol,
@@ -227,6 +227,18 @@ private static function provideNames(): iterable
             'PHPUnit',
             false,
         ];
+
+        yield 'name with extra spaces' => [
+            [' Pest '],
+            'Pest',
+            true,
+        ];
+
+        yield 'name with extra backslashes' => [
+            ['\\Pest\\'],
+            'Pest',
+            true,
+        ];
     }
 
     private static function provideRegex(): iterable