diff --git a/src/Type/Accessory/HasOffsetType.php b/src/Type/Accessory/HasOffsetType.php
index d0c5740db2a..e65fe55b722 100644
--- a/src/Type/Accessory/HasOffsetType.php
+++ b/src/Type/Accessory/HasOffsetType.php
@@ -22,6 +22,7 @@
 use PHPStan\Type\Traits\MaybeCallableTypeTrait;
 use PHPStan\Type\Traits\MaybeIterableTypeTrait;
 use PHPStan\Type\Traits\MaybeObjectTypeTrait;
+use PHPStan\Type\Traits\MaybeStringTypeTrait;
 use PHPStan\Type\Traits\NonGeneralizableTypeTrait;
 use PHPStan\Type\Traits\NonGenericTypeTrait;
 use PHPStan\Type\Traits\NonRemoveableTypeTrait;
@@ -44,6 +45,7 @@ class HasOffsetType implements CompoundType, AccessoryType
 	use MaybeCallableTypeTrait;
 	use MaybeIterableTypeTrait;
 	use MaybeObjectTypeTrait;
+	use MaybeStringTypeTrait;
 	use TruthyBooleanTypeTrait;
 	use NonGenericTypeTrait;
 	use UndecidedComparisonCompoundTypeTrait;
@@ -77,11 +79,6 @@ public function getObjectClassReflections(): array
 		return [];
 	}
 
-	public function getConstantStrings(): array
-	{
-		return [];
-	}
-
 	public function accepts(Type $type, bool $strictTypes): AcceptsResult
 	{
 		if ($type instanceof CompoundType) {
@@ -347,46 +344,6 @@ public function isInteger(): TrinaryLogic
 		return TrinaryLogic::createNo();
 	}
 
-	public function isString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNumericString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNonEmptyString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNonFalsyString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isLiteralString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isLowercaseString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isClassString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isUppercaseString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
 	public function getClassStringObjectType(): Type
 	{
 		return new ObjectWithoutClassType();
@@ -402,11 +359,6 @@ public function isVoid(): TrinaryLogic
 		return TrinaryLogic::createNo();
 	}
 
-	public function isScalar(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
 	public function looseCompare(Type $type, PhpVersion $phpVersion): BooleanType
 	{
 		return new BooleanType();
diff --git a/src/Type/Accessory/HasOffsetValueType.php b/src/Type/Accessory/HasOffsetValueType.php
index 1ae12e2ced0..54bcea9872a 100644
--- a/src/Type/Accessory/HasOffsetValueType.php
+++ b/src/Type/Accessory/HasOffsetValueType.php
@@ -27,6 +27,7 @@
 use PHPStan\Type\Traits\MaybeCallableTypeTrait;
 use PHPStan\Type\Traits\MaybeIterableTypeTrait;
 use PHPStan\Type\Traits\MaybeObjectTypeTrait;
+use PHPStan\Type\Traits\MaybeStringTypeTrait;
 use PHPStan\Type\Traits\NonGeneralizableTypeTrait;
 use PHPStan\Type\Traits\NonGenericTypeTrait;
 use PHPStan\Type\Traits\NonRemoveableTypeTrait;
@@ -49,6 +50,7 @@ class HasOffsetValueType implements CompoundType, AccessoryType
 	use MaybeCallableTypeTrait;
 	use MaybeIterableTypeTrait;
 	use MaybeObjectTypeTrait;
+	use MaybeStringTypeTrait;
 	use TruthyBooleanTypeTrait;
 	use NonGenericTypeTrait;
 	use UndecidedComparisonCompoundTypeTrait;
@@ -84,11 +86,6 @@ public function getObjectClassReflections(): array
 		return [];
 	}
 
-	public function getConstantStrings(): array
-	{
-		return [];
-	}
-
 	public function accepts(Type $type, bool $strictTypes): AcceptsResult
 	{
 		if ($type instanceof CompoundType) {
@@ -441,46 +438,6 @@ public function isInteger(): TrinaryLogic
 		return TrinaryLogic::createNo();
 	}
 
-	public function isString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNumericString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNonEmptyString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isNonFalsyString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isLiteralString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isLowercaseString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isUppercaseString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
-	public function isClassString(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
 	public function getClassStringObjectType(): Type
 	{
 		return new ObjectWithoutClassType();
@@ -496,11 +453,6 @@ public function isVoid(): TrinaryLogic
 		return TrinaryLogic::createNo();
 	}
 
-	public function isScalar(): TrinaryLogic
-	{
-		return TrinaryLogic::createMaybe();
-	}
-
 	public function looseCompare(Type $type, PhpVersion $phpVersion): BooleanType
 	{
 		return new BooleanType();
diff --git a/src/Type/Traits/MaybeStringTypeTrait.php b/src/Type/Traits/MaybeStringTypeTrait.php
new file mode 100644
index 00000000000..caa9abacb42
--- /dev/null
+++ b/src/Type/Traits/MaybeStringTypeTrait.php
@@ -0,0 +1,60 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Traits;
+
+use PHPStan\TrinaryLogic;
+
+trait MaybeStringTypeTrait
+{
+
+	public function getConstantStrings(): array
+	{
+		return [];
+	}
+
+	public function isString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isNumericString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isNonEmptyString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isNonFalsyString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isLiteralString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isLowercaseString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isUppercaseString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isClassString(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+	public function isScalar(): TrinaryLogic
+	{
+		return TrinaryLogic::createMaybe();
+	}
+
+}