diff --git a/.devcontainer/post-create.sh b/.devcontainer/post-create.sh
index 43930b4..98372f5 100755
--- a/.devcontainer/post-create.sh
+++ b/.devcontainer/post-create.sh
@@ -16,8 +16,8 @@ if uname -a | grep -q 'aarch64'; then
     $GHIDRA_INSTALL_DIR/support/buildNatives
 fi
 
-# install local workspace
-pip install -e .
+# install local workspace and test requirements
+pip install -e ".[testing]"
 
 # Setup Ghidra Dev for Reference
 # git clone https://github.com/NationalSecurityAgency/ghidra.git ~/ghidra-master
diff --git a/.github/workflows/lint-python-package.yml b/.github/workflows/lint-python-package.yml
new file mode 100644
index 0000000..b036273
--- /dev/null
+++ b/.github/workflows/lint-python-package.yml
@@ -0,0 +1,45 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Lint Python Package
+
+on:
+  push:
+    branches: [ "pytest" ]
+#   pull_request:
+#     branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.11"]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install autopep8 flake8 pytest               
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Install package
+      run: |
+        python -m pip install -e .   
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=130 --statistics --ignore F405,F401,F403
+    - name: Lint with autopep8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        autopep8 -r . -d
\ No newline at end of file
diff --git a/.github/workflows/pytest-devcontainer.yml b/.github/workflows/pytest-devcontainer.yml
new file mode 100644
index 0000000..93d3d8e
--- /dev/null
+++ b/.github/workflows/pytest-devcontainer.yml
@@ -0,0 +1,34 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Pytest Python Package In Devcontainer
+
+on:
+  push:
+    branches: [ "main", "pytest" ]
+  pull_request:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        image: ["latest", "10.1.5ghidra3.11python-bookworm"]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Test with pytest on devcontainer    
+      uses: devcontainers/ci@v0.3
+      with:
+        imageName: ghcr.io/clearbluejar/ghidra-python:${{matrix.image}}
+        cacheFrom: ghcr.io/clearbluejar/ghidra-python:${{matrix.image}}
+        push: never
+        runCmd: |
+          pip install --upgrade pip
+          pip install -e .
+          pip install -r tests/pytest-requirements.txt
+          pytest -rA
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 576a1e3..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-ghidra-stubs
-pyhidra
-mdutils
\ No newline at end of file
diff --git a/tests/test_diff.py b/tests/test_diff.py
new file mode 100644
index 0000000..c21e5c4
--- /dev/null
+++ b/tests/test_diff.py
@@ -0,0 +1,116 @@
+from pathlib import Path
+
+from ghidriff.ghidra_diff_engine import GhidraDiffEngine
+
+from ghidriff import get_parser, get_engine_classes, VersionTrackingDiff
+
+import requests
+import json
+import os
+
+def get_chrome_headers() -> dict:
+
+    headers =  {
+        "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
+        "accept-language": "en-US,en;q=0.9",
+        "cache-control": "no-cache",
+        "pragma": "no-cache",
+        "sec-ch-ua": '"Chromium";v="116", "Not)A;Brand";v="24", "Google Chrome";v="116"',
+        "sec-ch-ua-mobile": "?0",
+        "sec-ch-ua-platform": '"macOS"',
+        "sec-fetch-dest": "document",
+        "sec-fetch-mode": "navigate",
+        "sec-fetch-site": "none",
+        "sec-fetch-user": "?1",
+        "upgrade-insecure-requests": "1"
+    }
+
+    return headers
+
+
+
+def test_diff_afd_cve_2023_21768(shared_datadir: Path):
+    """
+    Tests end to end diff of CVE
+    """
+    
+    test_name = 'cve-2023-21768'
+    output_path = shared_datadir / test_name
+    output_path.mkdir(exist_ok=True, parents=True)
+
+    
+    # setup bins
+    old_bin_path = shared_datadir / 'afd.sys.x64.10.0.22621.1028'
+    old_url = 'https://msdl.microsoft.com/download/symbols/afd.sys/0C5C6994A8000/afd.sys'
+    new_bin_path = shared_datadir / 'afd.sys.x64.10.0.22621.1415'
+    new_url = 'https://msdl.microsoft.com/download/symbols/afd.sys/50989142A9000/afd.sys'
+
+    # download binaries    
+    # TODO this download can fail, store in repo?
+    headers = get_chrome_headers()
+    old_bin_path.write_bytes(requests.get(old_url,headers=headers).content)
+    new_bin_path.write_bytes(requests.get(new_url,headers=headers).content)
+
+    assert old_bin_path.exists()
+    assert new_bin_path.exists()
+
+    parser = get_parser()
+
+    GhidraDiffEngine.add_ghidra_args_to_parser(parser)
+
+    args = parser.parse_args([str(old_bin_path.absolute()),str(new_bin_path.absolute())])
+
+    engine_log_path = output_path / parser.get_default('log_path')
+
+    binary_paths = args.old + [bin for sublist in args.new for bin in sublist]
+
+    binary_paths = [Path(path) for path in binary_paths]    
+
+    if any([not path.exists() for path in binary_paths]):
+        missing_bins = [f'{path.name}' for path in binary_paths if not path.exists()]
+        raise FileNotFoundError(f"Missing Bins: {' '.join(missing_bins)}")
+
+    project_name = f'{args.project_name}-{binary_paths[0].name}-{binary_paths[-1].name}'
+
+    
+    DiffEngine: GhidraDiffEngine = VersionTrackingDiff
+
+    d: GhidraDiffEngine = DiffEngine(args=args,
+                                     verbose=True,
+                                     threaded=args.threaded,
+                                     max_ram_percent=args.max_ram_percent,
+                                     print_jvm_flags=args.print_flags,
+                                     jvm_args=args.jvm_args,
+                                     force_analysis=args.force_analysis,
+                                     force_diff=args.force_diff,
+                                     verbose_analysis=args.va,
+                                     no_symbols=args.no_symbols,
+                                     engine_log_path=engine_log_path,
+                                     engine_log_level=args.log_level,
+                                     engine_file_log_level=args.file_log_level
+                                     )
+
+    d.setup_project(binary_paths, args.project_location, project_name, args.symbols_path)
+
+    d.analyze_project()
+
+    pdiff = d.diff_bins(old_bin_path, new_bin_path)
+    pdiff_json = json.dumps(pdiff)
+
+    d.validate_diff_json(pdiff_json)
+
+    diff_name = f"{old_bin_path.name}-{new_bin_path.name}_diff"
+
+    d.dump_pdiff_to_path(diff_name,
+                             pdiff,
+                             output_path,
+                             side_by_side=args.side_by_side,
+                             max_section_funcs=args.max_section_funcs,
+                             md_title=args.md_title)
+
+    assert len(pdiff['functions']['modified']) == 10
+    assert len(pdiff['functions']['added']) == 28
+    assert len(pdiff['functions']['deleted']) == 0
+
+    func_name = "AfdNotifyRemoveIoCompletion"
+    assert any([func_name in func['old']['name'] or func_name in func['new']['name'] for func in pdiff['functions']['modified'] ]) is True
\ No newline at end of file
diff --git a/tests/test_main.py b/tests/test_main.py
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/test_startup.py b/tests/test_startup.py
index 894e5fe..49a9cda 100644
--- a/tests/test_startup.py
+++ b/tests/test_startup.py
@@ -1,12 +1,63 @@
-from pathlib import Path
-import ghidriff
-import os
-import pytest
 import pyhidra
 
+def test_pyhidra_start():
+    pyhidra.start(verbose=True)
 
-def test_bogus_ghidra_install_dir(monkeypatch):
+def test_ghidra_install_dir():
+    import os
+    install_dir = os.getenv("GHIDRA_INSTALL_DIR")
+    assert install_dir == "/ghidra"
 
-    monkeypatch.setenv("GHIDRA_INSTALL_DIR", "/somebogusplace")
-    print(os.getenv('GHIDRA_INSTALL_DIR'))
-    pyhidra.start()
+#from ghidriff import GhidraDiffEngine
+# from pytest import MonkeyPatch
+
+# @pytest.fixture
+# def setup_bogus_env(mon):
+# from mock import patch
+
+# @patch('pyhidra.GHIDRA_INSTALL_DIR', "/someboguspath"):
+# def test_bogus_ghidra_install_dira():
+#     with pytest.raises(FileNotFoundError):            
+#         import pyhidra as err_pyhidra
+#         err_pyhidra.start(verbose=True)
+
+
+# def test_ghidra_install_dir():
+#     # import sys
+#     # sys.modules.pop('pyhidra')
+#     with MonkeyPatch.context() as mp:
+#         mp.delenv("GHIDRA_INSTALL_DIR")
+        
+#         import pyhidra    
+#         # print(os.getenv("GHIDRA_INSTALL_DIR"))
+#         with pytest.raises(SystemExit) as pytest_wrapped_e:
+#             launcher = pyhidra.start(verbose=True)
+#         assert pytest_wrapped_e.type == SystemExit
+#         #assert pytest_wrapped_e.value.code == 42
+#     import os
+#     print(os.getenv("GHIDRA_INSTALL_DIR"))
+#     # from importlib import reload
+#     # reload(pyhidra)
+#     import sys
+#     del sys.modules['pyhidra']
+        
+
+
+# def test_bogus_ghidra_install_dir():
+#     #monkeypatch.setenv("GHIDRA_INSTALL_DIR", '/someboguspath')        
+#     import os
+#     print(os.getenv("GHIDRA_INSTALL_DIR"))
+#     with MonkeyPatch.context() as mp:        
+#         with pytest.raises(FileNotFoundError):                                    
+#             import pyhidra
+#             #mp.setattr(pyhidra.constants,'GHIDRA_INSTALL_DIR', '/someboguspath')            
+#             pyhidra.start(verbose=True)
+
+        
+
+
+    
+    #     launcher = pyhidra.start(verbose=True)
+    #     print(launcher.check_ghidra_version())
+
+#det test_file_not_exist():
\ No newline at end of file