diff --git a/test/flex-wrap.test.ts b/test/flex-wrap.test.ts
new file mode 100644
index 0000000..01b7010
--- /dev/null
+++ b/test/flex-wrap.test.ts
@@ -0,0 +1,69 @@
+import { describe, expect, it } from "./suite.ts";
+import { createTerm } from "../term.ts";
+import { close, fit, fixed, open, type OpenElement, text } from "../ops.ts";
+import { print } from "./print.ts";
+
+const decode = (b: Uint8Array) => new TextDecoder().decode(b);
+const trim = (s: string) => s.split("\n").map((l) => l.trimEnd()).join("\n");
+
+// flexWrap is not a layout key yet; this shim lets the file type-check today.
+// The extra key is dropped by pack(), so it is inert at runtime against the
+// current build.
+const layout = (l: Record<string, unknown>): OpenElement["layout"] =>
+  l as unknown as OpenElement["layout"];
+
+describe("flex-wrap", () => {
+  it("row wrap: child exceeding main size breaks to the next line", async () => {
+    let term = await createTerm({ width: 6, height: 4 });
+    let res = term.render([
+      open("root", {
+        layout: layout({
+          width: fixed(2),
+          height: fixed(4),
+          direction: "ltr",
+          flexWrap: "wrap",
+        }),
+      }),
+      open("a", { layout: { width: fit(), height: fit() } }),
+      text("A"),
+      close(),
+      open("bc", { layout: { width: fit(), height: fit() } }),
+      text("BC"),
+      close(),
+      close(),
+    ]);
+    let lines = trim(print(decode(res.output), 6, 4)).split("\n");
+    // pins: "A" stays alone on the first flex line.
+    expect(lines[0]).toBe("A");
+    // pins: "BC" no longer fits beside "A", so it wraps to a second line.
+    expect(lines[1]).toBe("BC");
+  });
+
+  it("row wrap: wrapped child starts a new flex line at x=0", async () => {
+    let term = await createTerm({ width: 6, height: 4 });
+    let res = term.render([
+      open("root", {
+        layout: layout({
+          width: fixed(2),
+          height: fixed(4),
+          direction: "ltr",
+          flexWrap: "wrap",
+        }),
+      }),
+      open("a", { layout: { width: fit(), height: fit() } }),
+      text("A"),
+      close(),
+      open("bc", { layout: { width: fit(), height: fit() } }),
+      text("BC"),
+      close(),
+      close(),
+    ]);
+    // pins: the wrapped "BC" sits on cross-axis line 1 (y:1), not beside "A".
+    expect(res.info.get("bc")!.bounds).toEqual({
+      x: 0,
+      y: 1,
+      width: 2,
+      height: 1,
+    });
+  });
+});