diff --git a/e2e/binary/comm/BUILD.bazel b/e2e/binary/comm/BUILD.bazel
index c1c3dd563b2ca4b17152af53e505d6bf590537b5..7b003782958e61a07ce7cb1c88adf157b713b164 100644
--- a/e2e/binary/comm/BUILD.bazel
+++ b/e2e/binary/comm/BUILD.bazel
@@ -1,11 +1,33 @@
-load("@bazel_skylib//rules:build_test.bzl", "build_test")
+load("@bazel_skylib//rules:native_binary.bzl", "native_test")
+load("@rules_python_pytest//python_pytest:defs.bzl", "py_pytest_test")
 
-# TODO: write an _actual_ test for `comm`
+py_pytest_test(
+    name = "pytest",
+    size = "small",
+    srcs = ["comm.py"],
+    data = [
+        "a.txt",
+        "b.txt",
+        "expected.txt",
+        "@ape//ape:comm",
+    ],
+    deps = [
+        "//binary:pytest",
+    ],
+)
 
-build_test(
-    name = "comm",
+native_test(
+    name = "version",
     size = "small",
-    tags = ["stub"],
-    targets = ["@ape//ape:comm"],
-    visibility = ["//:__subpackages__"],
+    src = "@ape//ape:comm",
+    args = ["--version"],
 )
+
+test_suite(
+    name = "comm",
+    tests = [
+        "pytest",
+        "version",
+    ],
+    visibility = ["//:__subpackages__"],
+)
\ No newline at end of file
diff --git a/e2e/binary/comm/a.txt b/e2e/binary/comm/a.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0a207c060e61f3b88eaee0a8cd0696f46fb155eb
--- /dev/null
+++ b/e2e/binary/comm/a.txt
@@ -0,0 +1,2 @@
+a
+b
\ No newline at end of file
diff --git a/e2e/binary/comm/b.txt b/e2e/binary/comm/b.txt
new file mode 100644
index 0000000000000000000000000000000000000000..63d8dbd40c23542e740659a7168a0ce3138ea748
--- /dev/null
+++ b/e2e/binary/comm/b.txt
@@ -0,0 +1 @@
+b
\ No newline at end of file
diff --git a/e2e/binary/comm/comm.py b/e2e/binary/comm/comm.py
new file mode 100644
index 0000000000000000000000000000000000000000..909f0bed9a56c9bc0bad1c3d6ce677af3eda7d29
--- /dev/null
+++ b/e2e/binary/comm/comm.py
@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from pathlib import Path
+from subprocess import run
+
+from binary import Diff, Relative, Tool
+
+
+def test_comm(tool: Tool, relative: Relative, tmp_path: Path) -> None:
+    binary = tool("comm")
+    a = relative("a.txt")
+    b = relative("b.txt")
+    expected = relative("expected.txt")
+    output = tmp_path / "output.txt"
+
+    cmd = (binary, "-1", "-2", a, b)
+    with open(output, "w") as stream:
+        run(cmd, check=True, timeout=30, stdout=stream)
+    assert Diff(expected) == Diff(output)
\ No newline at end of file
diff --git a/e2e/binary/comm/expected.txt b/e2e/binary/comm/expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..61780798228d17af2d34fce4cfbdf35556832472
--- /dev/null
+++ b/e2e/binary/comm/expected.txt
@@ -0,0 +1 @@
+b