diff --git a/dangerzone/container_utils.py b/dangerzone/container_utils.py
index 3a0fbbf..f0735d0 100644
--- a/dangerzone/container_utils.py
+++ b/dangerzone/container_utils.py
@@ -11,9 +11,7 @@ from .settings import Settings
 from .util import get_resource_path, get_subprocess_startupinfo
 
 OLD_CONTAINER_NAME = "dangerzone.rocks/dangerzone"
-CONTAINER_NAME = (
-    "ghcr.io/almet/dangerzone/dangerzone"
-)  # FIXME: Change this to the correct container name
+CONTAINER_NAME = "ghcr.io/almet/dangerzone/dangerzone"  # FIXME: Change this to the correct container name
 
 log = logging.getLogger(__name__)
 
@@ -230,7 +228,9 @@ def get_image_id_by_digest(digest: str) -> str:
     return process.stdout.decode().strip().split("\n")[0]
 
 
-def container_pull(image: str, manifest_digest: str, callback: Callable):
+def container_pull(
+    image: str, manifest_digest: str, callback: Optional[Callable] = None
+):
     """Pull a container image from a registry."""
     runtime = Runtime()
     cmd = [str(runtime.path), "pull", f"{image}@sha256:{manifest_digest}"]
@@ -242,8 +242,9 @@ def container_pull(image: str, manifest_digest: str, callback: Callable):
         bufsize=1,
     )
 
-    for line in process.stdout:  # type: ignore
-        callback(line)
+    if callback:
+        for line in process.stdout:  # type: ignore
+            callback(line)
 
     process.wait()
     if process.returncode != 0:
diff --git a/dangerzone/updater/signatures.py b/dangerzone/updater/signatures.py
index b620c1a..5670443 100644
--- a/dangerzone/updater/signatures.py
+++ b/dangerzone/updater/signatures.py
@@ -486,7 +486,7 @@ def prepare_airgapped_archive(image_name: str, destination: str) -> None:
 
 
 def upgrade_container_image(
-    image: str, manifest_digest: str, pubkey: str, callback: Callable
+    image: str, manifest_digest: str, pubkey: str, callback: Optional[Callable] = None
 ) -> str:
     """Verify and upgrade the image to the latest, if signed."""
     update_available, remote_digest = registry.is_new_remote_image_available(image)
diff --git a/tests/test_signatures.py b/tests/test_signatures.py
index b744db8..e7ca24a 100644
--- a/tests/test_signatures.py
+++ b/tests/test_signatures.py
@@ -278,85 +278,6 @@ def test_stores_signatures_updates_last_log_index(valid_signature, mocker, tmp_p
         return_value=100,
     )
 
-    # Call store_signatures
-    with pytest.raises(errors.SignatureMismatch):
-        store_signatures(signatures, image_digest, TEST_PUBKEY_PATH)
-        ("dangerzone.updater.signatures.get_last_log_index",)
-    # Verify that the signatures file was not created
-    assert not (signatures_path / f"{image_digest}.json").exists()
-
-    # Verify that the log index file was not updated
-    assert not (signatures_path / "last_log_index").exists()
-
-
-def test_stores_signatures_updates_last_log_index(valid_signature, mocker, tmp_path):
-    """Test that store_signatures updates the last log index file."""
-    signatures = [valid_signature]
-    # Extract the digest from the signature
-    image_digest = Signature(valid_signature).manifest_digest
-    signatures = [valid_signature, signature_other_digest]
-    breakpoint()
-    valid_signature, signature_other_digest, mocker, tmp_path
-
-    """Test that store_signatures raises an error when a signature's digest doesn't match."""
-
-    image_digest = "sha256:123456"
-
-    # Mock the signatures path
-    signatures_path = tmp_path / "signatures"
-    signatures_path.mkdir()
-    mocker.patch("dangerzone.updater.signatures.SIGNATURES_PATH", signatures_path)
-
-    # Mock get_log_index_from_signatures
-    mocker.patch(
-        "dangerzone.updater.signatures.get_log_index_from_signatures",
-        return_value=100,
-    )
-
-    # Mock get_last_log_index
-    mocker.patch(
-        "dangerzone.updater.signatures.get_last_log_index",
-        return_value=50,
-    )
-
-
-def test_stores_signatures_updates_last_log_index():
-    pass
-
-    # Mock the signatures path
-    signatures_path = tmp_path / "signatures"
-    signatures_path.mkdir()
-    mocker.patch("dangerzone.updater.signatures.SIGNATURES_PATH", signatures_path)
-
-    # Mock get_log_index_from_signatures
-    mocker.patch(
-        "dangerzone.updater.signatures.get_log_index_from_signatures",
-        return_value=100,
-    )
-
-    # Mock get_last_log_index
-    mocker.patch(
-        "dangerzone.updater.signatures.get_last_log_index",
-        return_value=50,
-    )
-
-
-def test_get_file_digest():
-    # Mock the signatures path
-    signatures_path = tmp_path / "signatures"
-    signatures_path.mkdir()
-    mocker.patch("dangerzone.updater.signatures.SIGNATURES_PATH", signatures_path)
-
-    # Create an existing last_log_index file with a lower value
-    with open(signatures_path / "last_log_index", "w") as f:
-        f.write("50")
-
-    # Mock get_log_index_from_signatures to return a higher value
-    mocker.patch(
-        "dangerzone.updater.signatures.get_log_index_from_signatures",
-        return_value=100,
-    )
-
     # Call store_signatures
     store_signatures(signatures, image_digest, TEST_PUBKEY_PATH)