diff --git a/poetry.lock b/poetry.lock
index 0ab03aa..0beec8d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -386,6 +386,20 @@ python-versions = ">=3.6"
 py = "*"
 pytest = ">=3.10"
 
+[[package]]
+name = "pytest-mock"
+version = "3.10.0"
+description = "Thin-wrapper around the mock package for easier use with pytest"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+pytest = ">=5.0"
+
+[package.extras]
+dev = ["pre-commit", "pytest-asyncio", "tox"]
+
 [[package]]
 name = "pytest-xdist"
 version = "2.5.0"
@@ -488,7 +502,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<3.11"
-content-hash = "5ed0423136bff7b3208bab5cc90ef6e1aa03918b9cb3e81b10d60d9a84c47de9"
+content-hash = "098fe8820fcf719b946a0b92b29a64e93e68107e9fe0340b1d8503e53b2802fd"
 
 [metadata.files]
 altgraph = [
@@ -783,6 +797,10 @@ pytest-forked = [
     {file = "pytest-forked-1.4.0.tar.gz", hash = "sha256:8b67587c8f98cbbadfdd804539ed5455b6ed03802203485dd2f53c1422d7440e"},
     {file = "pytest_forked-1.4.0-py3-none-any.whl", hash = "sha256:bbbb6717efc886b9d64537b41fb1497cfaf3c9601276be8da2cccfea5a3c8ad8"},
 ]
+pytest-mock = [
+    {file = "pytest-mock-3.10.0.tar.gz", hash = "sha256:fbbdb085ef7c252a326fd8cdcac0aa3b1333d8811f131bdcc701002e1be7ed4f"},
+    {file = "pytest_mock-3.10.0-py3-none-any.whl", hash = "sha256:f4c973eeae0282963eb293eb173ce91b091a79c1334455acfac9ddee8a1c784b"},
+]
 pytest-xdist = [
     {file = "pytest-xdist-2.5.0.tar.gz", hash = "sha256:4580deca3ff04ddb2ac53eba39d76cb5dd5edeac050cb6fbc768b0dd712b4edf"},
     {file = "pytest_xdist-2.5.0-py3-none-any.whl", hash = "sha256:6fe5c74fec98906deb8f2d2b616b5c782022744978e7bd4695d39c8f42d0ce65"},
diff --git a/pyproject.toml b/pyproject.toml
index 40d66f3..d554bfc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,9 @@ dangerzone = 'dangerzone:main'
 dangerzone-container = 'dangerzone:main'
 dangerzone-cli = 'dangerzone:main'
 
+[tool.poetry.group.dev.dependencies]
+pytest-mock = "^3.10.0"
+
 [build-system]
 requires = ["poetry>=1.1.4"]
 build-backend = "poetry.masonry.api"
diff --git a/tests/test_document.py b/tests/test_document.py
index 1cff181..df3550a 100644
--- a/tests/test_document.py
+++ b/tests/test_document.py
@@ -3,11 +3,12 @@ import platform
 import stat
 import tempfile
 from pathlib import Path
+from unittest.mock import MagicMock
 
 import pytest
 
 from dangerzone import errors
-from dangerzone.document import SAFE_EXTENSION, Document
+from dangerzone.document import ARCHIVE_SUBDIR, SAFE_EXTENSION, Document
 
 from . import sample_doc, unreadable_pdf
 
@@ -16,6 +17,10 @@ def test_input_sample_init(sample_doc: str) -> None:
     Document(sample_doc)
 
 
+def test_input_sample_init_archive(sample_doc: str) -> None:
+    Document(sample_doc, archive=True)
+
+
 def test_input_sample_after(sample_doc: str) -> None:
     d = Document()
     d.input_filename = sample_doc
@@ -78,6 +83,40 @@ def test_output_file_not_pdf(tmp_path: Path) -> None:
     assert not os.path.exists(docx_file)
 
 
+@pytest.mark.skipif(platform.system() == "Windows", reason="Unix-specific")
+def test_archive_unwriteable_dir(sample_doc: str, tmp_path: Path) -> None:
+    doc = tmp_path / "doc.pdf"
+    Path.touch(doc)
+    d = Document(str(doc))
+
+    # make archive directory unreadable
+    os.chmod(tmp_path, 0o400)
+
+    with pytest.raises(errors.UnwriteableArchiveDirException) as e:
+        d.validate_default_archive_dir()
+
+
+def test_archive(mocker: MagicMock, tmp_path: Path) -> None:
+    test_string = "original file"
+    original_doc_path = str(tmp_path / "doc.pdf")
+    archived_doc_path = str(tmp_path / ARCHIVE_SUBDIR / "doc.pdf")
+
+    # write some content for later verifying content integrity
+    with open(original_doc_path, "w") as f:
+        f.write(test_string)
+
+    d = Document(original_doc_path, archive=True)
+    d.archive()
+
+    # original document has been moved to unsafe/doc.pdf
+    assert not os.path.exists(original_doc_path)
+    assert os.path.exists(archived_doc_path)
+
+    # make sure it is the original file by comparing its content
+    with open(archived_doc_path) as f:
+        assert f.read() == test_string
+
+
 def test_set_output_dir(sample_doc: str, tmp_path: Path) -> None:
     d = Document(sample_doc)
     d.set_output_dir(str(tmp_path))