diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 8971b73149e..7c8c0ee02a8 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -5315,10 +5315,10 @@ declare namespace ts {
         getEditsForFileRename(oldFilePath: string, newFilePath: string, formatOptions: FormatCodeSettings, preferences: UserPreferences | undefined): readonly FileTextChanges[];
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean, forceDtsEmit?: boolean): EmitOutput;
         getProgram(): Program | undefined;
-        toggleLineComment(fileName: string, textRanges: TextRange): TextChange[];
-        toggleMultilineComment(fileName: string, textRanges: TextRange): TextChange[];
-        commentSelection(fileName: string, textRanges: TextRange): TextChange[];
-        uncommentSelection(fileName: string, textRanges: TextRange): TextChange[];
+        toggleLineComment(fileName: string, textRange: TextRange): TextChange[];
+        toggleMultilineComment(fileName: string, textRange: TextRange): TextChange[];
+        commentSelection(fileName: string, textRange: TextRange): TextChange[];
+        uncommentSelection(fileName: string, textRange: TextRange): TextChange[];
         dispose(): void;
     }
     interface JsxClosingTagInfo {
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 2a240298438..ef74029191f 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -5315,10 +5315,10 @@ declare namespace ts {
         getEditsForFileRename(oldFilePath: string, newFilePath: string, formatOptions: FormatCodeSettings, preferences: UserPreferences | undefined): readonly FileTextChanges[];
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean, forceDtsEmit?: boolean): EmitOutput;
         getProgram(): Program | undefined;
-        toggleLineComment(fileName: string, textRanges: TextRange): TextChange[];
-        toggleMultilineComment(fileName: string, textRanges: TextRange): TextChange[];
-        commentSelection(fileName: string, textRanges: TextRange): TextChange[];
-        uncommentSelection(fileName: string, textRanges: TextRange): TextChange[];
+        toggleLineComment(fileName: string, textRange: TextRange): TextChange[];
+        toggleMultilineComment(fileName: string, textRange: TextRange): TextChange[];
+        commentSelection(fileName: string, textRange: TextRange): TextChange[];
+        uncommentSelection(fileName: string, textRange: TextRange): TextChange[];
         dispose(): void;
     }
     interface JsxClosingTagInfo {