diff --git a/packages/coding-agent/test/read-summary.test.ts b/packages/coding-agent/test/read-summary.test.ts
index 6a2080860..527e727ea 100644
--- a/packages/coding-agent/test/read-summary.test.ts
+++ b/packages/coding-agent/test/read-summary.test.ts
@@ -134,12 +134,13 @@ describe("read summary", () => {
 			});
 			expect(defaultResult.details?.contentType).toBeUndefined();
 
-			// Opt-in: tagged for the TUI preview while the model-facing text stays verbatim.
+			// Opt-in: tagged for the TUI preview. The preview text mirrors the addressable
+			// rows, so the file's terminal newline is not included (see splitAddressableFileLines).
 			const result = await previewTool.execute(`read-summary-markdown-${extension}`, { path: fixture });
 			const text = textOutput(result);
 
 			expect(result.details?.contentType).toBe("text/markdown");
-			expect(result.details?.displayContent?.text).toBe(markdown);
+			expect(result.details?.displayContent?.text).toBe("# Heading\n\nSome **bold** text.");
 			expect(text.split("\n")[0]).toMatch(new RegExp(`^\\[fixture\\.${extension}#[0-9A-F]{4}\\]$`));
 			expect(text).toContain("1:# Heading");
 			expect(text).toContain("3:Some **bold** text.");