diff --git a/packages/eslint-plugin/test/__file_snapshots__/types/expect-error-range/expect-error-range-tests.ts.lint b/packages/eslint-plugin/test/__file_snapshots__/types/expect-error-range/expect-error-range-tests.ts.lint
index fa666e0891..ab306d180d 100644
--- a/packages/eslint-plugin/test/__file_snapshots__/types/expect-error-range/expect-error-range-tests.ts.lint
+++ b/packages/eslint-plugin/test/__file_snapshots__/types/expect-error-range/expect-error-range-tests.ts.lint
@@ -18,7 +18,7 @@ Unused '@ts-expect-error' directive
 ==== types/expect-error-range/expect-error-range-tests.ts ====
 
     // In TypeScript <5.5, elem will have type "string",
-    // but 5.5 it will be "string | number".
+    // but 5.5 it will be "string | undefined".
     const elem = ["value", undefined].filter(x => x != null)[0];
     
     
diff --git a/packages/eslint-plugin/test/fixtures/types/expect-error-range/expect-error-range-tests.ts b/packages/eslint-plugin/test/fixtures/types/expect-error-range/expect-error-range-tests.ts
index ccee000edc..28f07a2d2c 100644
--- a/packages/eslint-plugin/test/fixtures/types/expect-error-range/expect-error-range-tests.ts
+++ b/packages/eslint-plugin/test/fixtures/types/expect-error-range/expect-error-range-tests.ts
@@ -1,5 +1,5 @@
 // In TypeScript <5.5, elem will have type "string",
-// but 5.5 it will be "string | number".
+// but 5.5 it will be "string | undefined".
 const elem = ["value", undefined].filter(x => x != null)[0];