diff --git a/e2e/binary/yes/BUILD.bazel b/e2e/binary/yes/BUILD.bazel
index e9605cc491c74b1d4be91d6bf0d4edd0ed14d3e8..2f2534dee3c15fd67e28c34a14c738659ce8b2c8 100644
--- a/e2e/binary/yes/BUILD.bazel
+++ b/e2e/binary/yes/BUILD.bazel
@@ -1,11 +1,31 @@
-load("@bazel_skylib//rules:build_test.bzl", "build_test")
+load("@rules_python_pytest//python_pytest:defs.bzl", "py_pytest_test")
+load("@bazel_skylib//rules:native_binary.bzl", "native_test")
 
-# TODO: write an _actual_ test for `yes`
+py_pytest_test(
+    name = "pytest",
+    size = "small",
+    srcs = ["yes.py"],
+    data = [
+        "@ape//ape:yes",
+        "expected.txt",
+    ],
+    deps = [
+        "//binary:pytest",
+    ],
+)
 
-build_test(
-    name = "yes",
+native_test(
+    name = "version",
     size = "small",
-    tags = ["stub"],
-    targets = ["@ape//ape:yes"],
+    src = "@ape//ape:yes",
+    args = ["--version"],
+)
+
+test_suite(
+    name = "yes",
+    tests = [
+        "pytest",
+        "version",
+    ],
     visibility = ["//:__subpackages__"],
 )
diff --git a/e2e/binary/yes/expected.txt b/e2e/binary/yes/expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..57dc54cc8a5e9327c7467d103b8d3b909896a98f
--- /dev/null
+++ b/e2e/binary/yes/expected.txt
@@ -0,0 +1,5 @@
+y
+y
+y
+y
+y
diff --git a/e2e/binary/yes/yes.py b/e2e/binary/yes/yes.py
new file mode 100644
index 0000000000000000000000000000000000000000..d34a3c17983de27dc56a159c552f53dda24005a0
--- /dev/null
+++ b/e2e/binary/yes/yes.py
@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+from subprocess import Popen, PIPE
+from pathlib import Path
+
+from binary import Tool, Relative, Diff
+
+
+def test_yes(tool: Tool, relative: Relative, tmp_path: Path) -> None:
+    binary = tool("yes")
+    expected = relative("expected.txt")
+    output = tmp_path / "output.txt"
+
+    process = Popen(binary, stdout=PIPE, text=True)
+
+    with open(output, "w") as stream:
+        for i in range(5):
+            stream.write(process.stdout.readline())
+
+    process.terminate()
+
+    assert Diff(expected) == Diff(output)