diff --git a/tests/PHPStan/Rules/Variables/NullCoalesceRuleTest.php b/tests/PHPStan/Rules/Variables/NullCoalesceRuleTest.php
index 4781fa1f18..a297b6b937 100644
--- a/tests/PHPStan/Rules/Variables/NullCoalesceRuleTest.php
+++ b/tests/PHPStan/Rules/Variables/NullCoalesceRuleTest.php
@@ -49,11 +49,11 @@ public function testCoalesceRule(): void
 				41,
 			],
 			[
-				'Offset \'string\' on array{1, 2, 3} on left side of ?? does not exist.',
+				'Offset \'string\' on array{1, 2, 3} on left side of ?? does not exist, use = instead.',
 				45,
 			],
 			[
-				'Offset \'string\' on array{array{1}, array{2}, array{3}} on left side of ?? does not exist.',
+				'Offset \'string\' on array{array{1}, array{2}, array{3}} on left side of ?? does not exist, use = instead.',
 				49,
 			],
 			[
@@ -65,11 +65,11 @@ public function testCoalesceRule(): void
 				67,
 			],
 			[
-				'Offset \'dim-null-not-set\' on array{dim: 1, dim-null: 1|null, dim-null-offset: array{a: true|null}, dim-empty: array{}} on left side of ?? does not exist.',
+				'Offset \'dim-null-not-set\' on array{dim: 1, dim-null: 1|null, dim-null-offset: array{a: true|null}, dim-empty: array{}} on left side of ?? does not exist, use = instead.',
 				73,
 			],
 			[
-				'Offset \'b\' on array{} on left side of ?? does not exist.',
+				'Offset \'b\' on array{} on left side of ?? does not exist, use = instead.',
 				79,
 			],
 			[
@@ -156,11 +156,11 @@ public function testCoalesceAssignRule(): void
 				41,
 			],
 			[
-				'Offset \'string\' on array{1, 2, 3} on left side of ??= does not exist.',
+				'Offset \'string\' on array{1, 2, 3} on left side of ??= does not exist, use = instead.',
 				45,
 			],
 			[
-				'Offset \'string\' on array{array{1}, array{2}, array{3}} on left side of ??= does not exist.',
+				'Offset \'string\' on array{array{1}, array{2}, array{3}} on left side of ??= does not exist, use = instead.',
 				49,
 			],
 			[
@@ -172,11 +172,11 @@ public function testCoalesceAssignRule(): void
 				67,
 			],
 			[
-				'Offset \'dim-null-not-set\' on array{dim: 1, dim-null: 0|1, dim-null-offset: array{a: true|null}, dim-empty: array{}} on left side of ??= does not exist.',
+				'Offset \'dim-null-not-set\' on array{dim: 1, dim-null: 0|1, dim-null-offset: array{a: true|null}, dim-empty: array{}} on left side of ??= does not exist, use = instead.',
 				73,
 			],
 			[
-				'Offset \'b\' on array{} on left side of ??= does not exist.',
+				'Offset \'b\' on array{} on left side of ??= does not exist, use = instead.',
 				79,
 			],
 			[