diff --git a/packages/pi-tui/test/terminal-capabilities.test.ts b/packages/pi-tui/test/terminal-capabilities.test.ts
index d06a34848..7c57566f6 100644
--- a/packages/pi-tui/test/terminal-capabilities.test.ts
+++ b/packages/pi-tui/test/terminal-capabilities.test.ts
@@ -1,6 +1,12 @@
 import assert from "node:assert";
 import { describe, it } from "node:test";
-import { isMultiplexerSession, shouldEnableHyperlinks, shouldEnableSyncOutput } from "../src/terminal-capabilities.ts";
+import {
+	createStaticCapabilities,
+	isMultiplexerSession,
+	shouldEnableHyperlinks,
+	shouldEnableSyncOutput,
+} from "../src/terminal-capabilities.ts";
+import { isImageLine as detectImageLine } from "../src/terminal-image.ts";
 
 describe("terminal-capabilities", () => {
 	it("detects mux via env and TERM fallback", () => {
@@ -24,4 +30,36 @@ describe("terminal-capabilities", () => {
 	it("hyperlinks off in mux", () => {
 		assert.strictEqual(shouldEnableHyperlinks({ TMUX: "x" }), false);
 	});
+	it("sync/hyperlinks env override ordering", () => {
+		// NO beats the static table.
+		assert.strictEqual(shouldEnableSyncOutput({ PI_NO_SYNC_OUTPUT: "1", TERM: "xterm-kitty" }), false);
+		// FORCE beats NO when both are set.
+		assert.strictEqual(shouldEnableSyncOutput({ PI_FORCE_SYNC_OUTPUT: "1", PI_NO_SYNC_OUTPUT: "1" }), true);
+		// NO disables hyperlinks.
+		assert.strictEqual(shouldEnableHyperlinks({ PI_NO_HYPERLINKS: "1" }), false);
+	});
+});
+
+describe("createStaticCapabilities", () => {
+	it("syncEnabled reflects env via the static factory", () => {
+		assert.strictEqual(createStaticCapabilities({ TERM: "xterm-kitty" }).syncEnabled, true);
+		assert.strictEqual(createStaticCapabilities({ TERM: "dumb" }).syncEnabled, false);
+	});
+	it("uses the conservative static defaults", () => {
+		const caps = createStaticCapabilities({ TERM: "xterm-kitty" });
+		assert.strictEqual(caps.supportsScreenToScrollback, false);
+		assert.strictEqual(caps.deccara, false);
+		assert.strictEqual(caps.imageProtocol, "none");
+	});
+	it("isImageLine delegates to the terminal-image detector", () => {
+		const caps = createStaticCapabilities({ TERM: "xterm-kitty" });
+		const kittyLine = "\x1b_Ga=T,f=100;AAAA\x1b\\";
+		const plainLine = "just a plain line of text";
+		// Real positive + negative cases against the assembled object.
+		assert.strictEqual(caps.isImageLine(kittyLine), true);
+		assert.strictEqual(caps.isImageLine(plainLine), false);
+		// And they match the real detector it delegates to.
+		assert.strictEqual(caps.isImageLine(kittyLine), detectImageLine(kittyLine));
+		assert.strictEqual(caps.isImageLine(plainLine), detectImageLine(plainLine));
+	});
 });