diff --git a/e2e/binary/od/BUILD.bazel b/e2e/binary/od/BUILD.bazel
index 09a1c195d7645e3c281ec1d90f3730d9b63003f3..0803db0574095f1733f6761cd36199a824b74f6d 100644
--- a/e2e/binary/od/BUILD.bazel
+++ b/e2e/binary/od/BUILD.bazel
@@ -1,11 +1,32 @@
-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 `od`
+py_pytest_test(
+    name = "pytest",
+    size = "small",
+    srcs = ["convert.py"],
+    data = [
+        "expected.txt",
+        "fixture.txt",
+        "@ape//ape:od",
+    ],
+    deps = [
+        "//binary:pytest",
+    ],
+)
 
-build_test(
-    name = "od",
+native_test(
+    name = "version",
     size = "small",
-    tags = ["stub"],
-    targets = ["@ape//ape:od"],
+    src = "@ape//ape:od",
+    args = ["--version"],
+)
+
+test_suite(
+    name = "od",
+    tests = [
+        "pytest",
+        "version",
+    ],
     visibility = ["//:__subpackages__"],
 )
diff --git a/e2e/binary/od/convert.py b/e2e/binary/od/convert.py
new file mode 100644
index 0000000000000000000000000000000000000000..8192ab38c875b15825003aa2310385a38dd7687a
--- /dev/null
+++ b/e2e/binary/od/convert.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_convert(tool: Tool, relative: Relative, tmp_path: Path) -> None:
+    tool = tool("od")
+    fixture = relative("fixture.txt")
+    expected = relative("expected.txt")
+    output = tmp_path / "output.txt"
+
+    cmd = (tool, f"{fixture}")
+    with output.open("w") as stream:
+        run(cmd, check=True, stdout=stream)
+
+    assert Diff(expected) == Diff(output)
diff --git a/e2e/binary/od/expected.txt b/e2e/binary/od/expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..99419798af7e5331777e1e23c66149205687a850
--- /dev/null
+++ b/e2e/binary/od/expected.txt
@@ -0,0 +1,2 @@
+0000000 062510 066154 026157 073440 071157 062154 005041
+0000016
diff --git a/e2e/binary/od/fixture.txt b/e2e/binary/od/fixture.txt
new file mode 100644
index 0000000000000000000000000000000000000000..af5626b4a114abcb82d63db7c8082c3c4756e51b
--- /dev/null
+++ b/e2e/binary/od/fixture.txt
@@ -0,0 +1 @@
+Hello, world!