diff --git a/tests/test.sh b/tests/test.sh
index f3089fe..52d73c8 100644
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -1,8 +1,31 @@
 #!/bin/bash
 set -euo pipefail
-IMAGE="${1:-}"
-if [ -z "$IMAGE" ]; then
-  echo "Usage: $0 <image>"
+
+IMAGE="$1"
+FAILED=0
+PASSED=0
+
+# Test 1: container runs and exits
+if docker run --rm "$IMAGE" --help > /dev/null 2>&1; then
+  echo "PASS: container runs successfully"
+  PASSED=$((PASSED + 1))
+else
+  echo "FAIL: container failed to run"
+  FAILED=$((FAILED + 1))
+fi
+
+# Test 2: produces output
+OUTPUT=$(docker run --rm "$IMAGE" --version 2>&1)
+if [ -n "$OUTPUT" ]; then
+  echo "PASS: produces output"
+  PASSED=$((PASSED + 1))
+else
+  echo "FAIL: no output"
+  FAILED=$((FAILED + 1))
+fi
+
+echo ""
+echo "$PASSED/$((PASSED + FAILED)) tests passed"
+if [ "$FAILED" -gt 0 ]; then
   exit 1
 fi
-docker run --rm "$IMAGE" --version