diff --git a/slackme/main.test.ts b/slackme/main.test.ts
index 53c6b2e..4b1e338 100644
--- a/slackme/main.test.ts
+++ b/slackme/main.test.ts
@@ -35,7 +35,7 @@ describe("slackme", async () => {
     expect(exec.exitCode).toBe(0);
     exec = await execContainer(id, ["sh", "-c", "slackme"]);
     expect(exec.stdout.trim()).toStartWith(
-      "slackme — Send a Slack notification when a command finishes",
+      "slackme — Send a Slack notification when a command finishes"
     );
   });
 
@@ -56,6 +56,15 @@ describe("slackme", async () => {
     });
   });
 
+  it("exits with command code", async () => {
+    const { instance, id } = await setupContainer();
+    await writeCoder(id, "echo 'some-url' && exit 1");
+    let exec = await execContainer(id, ["sh", "-c", instance.script]);
+    expect(exec.exitCode).toBe(0);
+    exec = await execContainer(id, ["sh", "-c", "slackme exit 1"]);
+    expect(exec.exitCode).toBe(1);
+  });
+
   it("formats multiline message", async () => {
     await assertSlackMessage({
       command: "echo test",
@@ -107,7 +116,7 @@ executed`,
 
 const setupContainer = async (
   image = "alpine",
-  vars: Record<string, string> = {},
+  vars: Record<string, string> = {}
 ) => {
   const state = await runTerraformApply(import.meta.dir, {
     agent_id: "foo",
@@ -150,7 +159,7 @@ const assertSlackMessage = async (opts: {
     "alpine/curl",
     opts.format && {
       slack_message: opts.format,
-    },
+    }
   );
   await writeCoder(id, "echo 'token'");
   let exec = await execContainer(id, ["sh", "-c", instance.script]);
diff --git a/slackme/slackme.sh b/slackme/slackme.sh
index 17f74ec..183aede 100644
--- a/slackme/slackme.sh
+++ b/slackme/slackme.sh
@@ -72,7 +72,8 @@ fi
 
 START=$(date +%s%N)
 # Run all arguments as a command
-$@
+"$@"
+CODE=$?
 END=$(date +%s%N)
 DURATION_MS=$${DURATION_MS:-$(( (END - START) / 1000000 ))}
 PRETTY_DURATION=$(pretty_duration $DURATION_MS)
@@ -85,3 +86,5 @@ SLACK_MESSAGE=$(echo "$SLACK_MESSAGE" | sed "s|\\$DURATION|$PRETTY_DURATION|g")
 curl --silent -o /dev/null --header "Authorization: Bearer $BOT_TOKEN" \
     -G --data-urlencode "text=$${SLACK_MESSAGE}" \
     "$SLACK_URL/api/chat.postMessage?channel=$USER_ID&pretty=1"
+
+exit $CODE