diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fef5e0f..13637b6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,7 +13,7 @@ jobs:
         run: docker build -t openzim/zimit:dev .
 
       - name: run crawl
-        run: docker run -v $PWD/output:/output openzim/zimit:dev zimit --url http://isago.ml/ --name isago --zim-file isago.zim
+        run: docker run -v $PWD/output:/output openzim/zimit:dev zimit --url http://isago.ml/ --name isago --zim-file isago.zim --adminEmail test@example.com --mobileDevice
 
-      - name: ensure zim exists
-        run: stat ./output/isago.zim
+      - name: run integration test suite
+        run: docker run -it -v $PWD/test/integration.py:/app/integration.py -v $PWD/output:/output openzim/zimit:dev bash -c "pip install pytest; pytest -v ./test/integration.py"
diff --git a/Dockerfile b/Dockerfile
index 0a78e00..ea89f56 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,11 @@
-FROM webrecorder/browsertrix-crawler:0.1.1
+FROM webrecorder/browsertrix-crawler:0.1.2
 
 RUN mkdir -p /output
 
 WORKDIR /app
 
-RUN pip install 'warc2zim>=1.3.1' 'requests>=2.24.0'
+#RUN pip install 'warc2zim>=1.3.1' 'requests>=2.24.0'
+RUN pip install git+https://github.com/openzim/warc2zim.git@replay-update
 
 ADD zimit.py /app/
 
diff --git a/test/integration.py b/test/integration.py
new file mode 100644
index 0000000..e73dbbc
--- /dev/null
+++ b/test/integration.py
@@ -0,0 +1,38 @@
+import os
+import glob
+
+import libzim.reader
+from warcio import ArchiveIterator
+
+def get_zim_article(zimfile, path):
+    zim_fh = libzim.reader.File(zimfile)
+    return zim_fh.get_article(path).content.tobytes()
+
+def test_is_file():
+    """ Ensure ZIM file exists"""
+    assert os.path.isfile("/output/isago.zim")
+
+def test_zim_main_page():
+    """ Main page specified, http://isago.ml/, was a redirect to https
+        Ensure main page is the redirected page"""
+
+    assert b'"https://isago.ml/"' in get_zim_article("/output/isago.zim", "A/index.html")
+
+def test_user_agent():
+    """ Test that mobile user agent was used in WARC request records with custom Zimit and email suffix"""
+
+    #result = get_zim_article("/output/isago.zim", "H/isago.ml/")
+    #print(result)
+    for warc in glob.glob("/output/.tmp*/collections/capture/archive/*.warc.gz"):
+        with open(warc, "rb") as fh:
+            for record in ArchiveIterator(fh):
+                if record.rec_type == "request":
+                    print(record.http_headers)
+                    ua = record.http_headers.get_header("User-Agent")
+                    if ua:
+                        assert "iPhone" in ua
+                        assert ua.endswith(" +Zimit test@example.com")
+                        return
+
+    # not found
+    assert False
diff --git a/zimit.py b/zimit.py
index 185299d..771f77f 100755
--- a/zimit.py
+++ b/zimit.py
@@ -83,6 +83,12 @@ def zimit(args=None):
         "--output", help="Output directory for ZIM and WARC files", default="/output"
     )
 
+    parser.add_argument("--adminEmail", help="Admin Email for Zimit crawler")
+
+    parser.add_argument(
+        "--mobileDevice", help="Crawl as Mobile Device", nargs="?", const="iPhone X"
+    )
+
     zimit_args, warc2zim_args = parser.parse_known_args(args)
 
     # pass url and output to warc2zim also
@@ -99,7 +105,7 @@ def zimit(args=None):
 
     print("----------")
     print("Testing warc2zim args")
-    print("Running: warc2zim " + " ".join(warc2zim_args))
+    print("Running: warc2zim " + " ".join(warc2zim_args), flush=True)
     res = warc2zim(warc2zim_args)
     if res != 100:
         print("Exiting, invalid warc2zim params")
@@ -109,11 +115,10 @@ def zimit(args=None):
     temp_root_dir = Path(tempfile.mkdtemp(dir=zimit_args.output, prefix=".tmp"))
 
     if not zimit_args.keep:
-
         def cleanup():
             print("")
             print("----------")
-            print(f"Cleanup, removing temp dir: {temp_root_dir}")
+            print(f"Cleanup, removing temp dir: {temp_root_dir}", flush=True)
             shutil.rmtree(temp_root_dir)
 
         atexit.register(cleanup)
@@ -123,6 +128,13 @@ def zimit(args=None):
         cmd_args.append("--url")
         cmd_args.append(url)
 
+    user_agent_suffix = "+Zimit "
+    if zimit_args.adminEmail:
+        user_agent_suffix += zimit_args.adminEmail
+
+    cmd_args.append("--userAgentSuffix")
+    cmd_args.append(user_agent_suffix)
+
     cmd_args.append("--cwd")
     cmd_args.append(str(temp_root_dir))
 
@@ -130,7 +142,8 @@ def zimit(args=None):
 
     print("")
     print("----------")
-    print(f"running browsertrix-crawler crawl: {cmd_line}")
+    print(f"Output to tempdir: {temp_root_dir} - {'will keep' if zimit_args.keep else 'will delete'}")
+    print(f"Running browsertrix-crawler crawl: {cmd_line}", flush=True)
     subprocess.run(cmd_args, check=True)
 
     warc_files = temp_root_dir / "collections" / "capture" / "archive"
@@ -140,7 +153,7 @@ def zimit(args=None):
 
     print("")
     print("----------")
-    print(f"Processing {num_files} WARC files to ZIM")
+    print(f"Processing {num_files} WARC files to ZIM", flush=True)
 
     return warc2zim(warc2zim_args)
 
@@ -149,7 +162,7 @@ def check_url(url):
     try:
         resp = requests.head(url, stream=True, allow_redirects=True, timeout=10)
     except requests.exceptions.RequestException as exc:
-        print(f"failed to connect to {url}: {exc}")
+        print(f"failed to connect to {url}: {exc}", flush=True)
         raise SystemExit(1)
     actual_url = resp.url
 
@@ -176,6 +189,7 @@ def get_node_cmd_line(args):
         "scope",
         "exclude",
         "scroll",
+        "mobileDevice",
     ]:
         value = getattr(args, arg)
         if value:
@@ -191,7 +205,7 @@ def sigint_handler(*args):
     print("")
     print("SIGINT/SIGTERM received, stopping zimit")
     print("")
-    print("")
+    print("", flush=True)
     sys.exit(3)