diff --git a/src/core/tools/__tests__/insertContentTool.test.ts b/src/core/tools/__tests__/insertContentTool.test.ts
index c9c48ba5b0..7f0832a8ea 100644
--- a/src/core/tools/__tests__/insertContentTool.test.ts
+++ b/src/core/tools/__tests__/insertContentTool.test.ts
@@ -48,28 +48,6 @@ jest.mock("../../ignore/RooIgnoreController", () => ({
 	},
 }))
 
-// Mock insertGroups from diff/insert-groups
-jest.mock("../../diff/insert-groups", () => ({
-	insertGroups: jest.fn().mockImplementation((lines, groups) => {
-		let newLines = [...lines]
-		for (const group of groups) {
-			const { index, elements } = group
-			if (index === -1 || index >= newLines.length) {
-				// Append to end
-				newLines.push(...elements)
-			} else if (index < 0) {
-				// Insert at beginning (index -1 for line 0, but insertGroups expects 0 for beginning)
-				// This mock simplifies, assuming index -1 is always append.
-				// For line 1, index is 0.
-				newLines.splice(0, 0, ...elements)
-			} else {
-				newLines.splice(index, 0, ...elements)
-			}
-		}
-		return newLines
-	}),
-}))
-
 describe("insertContentTool", () => {
 	const testFilePath = "test/file.txt"
 	const absoluteFilePath = "/test/file.txt"
@@ -77,7 +55,6 @@ describe("insertContentTool", () => {
 	const mockedFileExistsAtPath = fileExistsAtPath as jest.MockedFunction<typeof fileExistsAtPath>
 	const mockedFsReadFile = fs.readFile as jest.MockedFunction<typeof fs.readFile>
 	const mockedPathResolve = path.resolve as jest.MockedFunction<typeof path.resolve>
-	const mockedInsertGroups = require("../../diff/insert-groups").insertGroups as jest.MockedFunction<any>
 
 	let mockCline: any
 	let mockAskApproval: jest.Mock
diff --git a/src/core/tools/insertContentTool.ts b/src/core/tools/insertContentTool.ts
index 704d2bcb54..b76769fcf0 100644
--- a/src/core/tools/insertContentTool.ts
+++ b/src/core/tools/insertContentTool.ts
@@ -116,11 +116,22 @@ export async function insertContentTool(
 			await delay(200)
 		}
 
-		const diff = formatResponse.createPrettyPatch(relPath, fileContent, updatedContent)
+		// For consistency with writeToFileTool, handle new files differently
+		let diff: string | undefined
+		let approvalContent: string | undefined
 
-		if (fileExists && !diff) {
-			pushToolResult(`No changes needed for '${relPath}'`)
-			return
+		if (fileExists) {
+			// For existing files, generate diff and check for changes
+			diff = formatResponse.createPrettyPatch(relPath, fileContent, updatedContent)
+			if (!diff) {
+				pushToolResult(`No changes needed for '${relPath}'`)
+				return
+			}
+			approvalContent = undefined
+		} else {
+			// For new files, skip diff generation and provide full content
+			diff = undefined
+			approvalContent = updatedContent
 		}
 
 		await cline.diffViewProvider.update(updatedContent, true)
@@ -128,6 +139,7 @@ export async function insertContentTool(
 		const completeMessage = JSON.stringify({
 			...sharedMessageProps,
 			diff,
+			content: approvalContent,
 			lineNumber: lineNumber,
 			isProtected: isWriteProtected,
 		} satisfies ClineSayTool)