diff --git a/src/Type/TypeCombinator.php b/src/Type/TypeCombinator.php
index 69351e75b3..be48ebe6ff 100644
--- a/src/Type/TypeCombinator.php
+++ b/src/Type/TypeCombinator.php
@@ -33,6 +33,7 @@
 use function array_values;
 use function count;
 use function get_class;
+use function in_array;
 use function is_int;
 use function sprintf;
 use function usort;
@@ -494,54 +495,50 @@ private static function compareTypesInUnion(Type $a, Type $b): ?array
 		if (
 			$a instanceof ConstantStringType
 		) {
-			$description = $b->describe(VerbosityLevel::value());
-			if (
-				$a->getValue() === ''
-				&& ($description === 'non-empty-string'
-				|| $description === 'non-falsy-string')
-			) {
-				return [null, self::intersect(
-					new StringType(),
-					...self::getAccessoryCaseStringTypes($b),
-				)];
-			}
-
-			if (
-				$a->getValue() === '0'
-				&& $description === 'non-falsy-string'
-			) {
-				return [null, new IntersectionType([
-					new StringType(),
-					new AccessoryNonEmptyStringType(),
-					...self::getAccessoryCaseStringTypes($b),
-				])];
+			if ($a->getValue() === '') {
+				$description = $b->describe(VerbosityLevel::value());
+				if (in_array($description, ['non-empty-string', 'non-falsy-string'], true)) {
+					return [null, self::intersect(
+						new StringType(),
+						...self::getAccessoryCaseStringTypes($b),
+					)];
+				}
+			}
+
+			if ($a->getValue() === '0') {
+				$description = $b->describe(VerbosityLevel::value());
+				if ($description === 'non-falsy-string') {
+					return [null, new IntersectionType([
+						new StringType(),
+						new AccessoryNonEmptyStringType(),
+						...self::getAccessoryCaseStringTypes($b),
+					])];
+				}
 			}
 		}
 
 		if (
 			$b instanceof ConstantStringType
 		) {
-			$description = $a->describe(VerbosityLevel::value());
-			if (
-				$b->getValue() === ''
-				&& ($description === 'non-empty-string'
-				|| $description === 'non-falsy-string')
-			) {
-				return [self::intersect(
-					new StringType(),
-					...self::getAccessoryCaseStringTypes($a),
-				), null];
-			}
-
-			if (
-				$b->getValue() === '0'
-				&& $description === 'non-falsy-string'
-			) {
-				return [new IntersectionType([
-					new StringType(),
-					new AccessoryNonEmptyStringType(),
-					...self::getAccessoryCaseStringTypes($a),
-				]), null];
+			if ($b->getValue() === '') {
+				$description = $a->describe(VerbosityLevel::value());
+				if (in_array($description, ['non-empty-string', 'non-falsy-string'], true)) {
+					return [self::intersect(
+						new StringType(),
+						...self::getAccessoryCaseStringTypes($a),
+					), null];
+				}
+			}
+
+			if ($b->getValue() === '0') {
+				$description = $a->describe(VerbosityLevel::value());
+				if ($description === 'non-falsy-string') {
+					return [new IntersectionType([
+						new StringType(),
+						new AccessoryNonEmptyStringType(),
+						...self::getAccessoryCaseStringTypes($a),
+					]), null];
+				}
 			}
 		}