diff --git a/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/Fixture/skip_union_type_on_php74.php.inc b/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/Fixture/skip_union_type_on_php74.php.inc
new file mode 100644
index 00000000000..c743ebf08e6
--- /dev/null
+++ b/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/Fixture/skip_union_type_on_php74.php.inc
@@ -0,0 +1,23 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromStrictTypedCallRector\Fixture;
+
+final class SkipUnionTypesOnPHP74
+{
+    public function getTogether()
+    {
+        if (mt_rand(0, 1)) {
+            return $this->getValue();
+        }
+
+        return $this->getNextValue();
+    }
+
+    private function getValue(): int|string
+    {
+    }
+
+    private function getNextValue(): float|string
+    {
+    }
+}
diff --git a/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/FixturePhp80/merge_union_types.php.inc b/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/FixturePhp80/merge_union_types.php.inc
new file mode 100644
index 00000000000..c214114062d
--- /dev/null
+++ b/rules-tests/TypeDeclaration/Rector/ClassMethod/ReturnTypeFromStrictTypedCallRector/FixturePhp80/merge_union_types.php.inc
@@ -0,0 +1,51 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromStrictTypedCallRector\FixturePhp80;
+
+final class MergeUnionTypes
+{
+    public function getTogether()
+    {
+        if (mt_rand(0, 1)) {
+            return $this->getValue();
+        }
+
+        return $this->getNextValue();
+    }
+
+    private function getValue(): int|string
+    {
+    }
+
+    private function getNextValue(): float|string
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\ReturnTypeFromStrictTypedCallRector\FixturePhp80;
+
+final class MergeUnionTypes
+{
+    public function getTogether(): int|string|float
+    {
+        if (mt_rand(0, 1)) {
+            return $this->getValue();
+        }
+
+        return $this->getNextValue();
+    }
+
+    private function getValue(): int|string
+    {
+    }
+
+    private function getNextValue(): float|string
+    {
+    }
+}
+
+?>