diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index bee2c6f..e3276d9 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -56,19 +56,18 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Install a specific version of uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@v6
         with:
-          enable-cache: true
-          version: "0.5.x"
+          version: "latest"
 
       - name: uv sync
         working-directory: python
-        run: uv sync --no-install-package geoindex-rs
+        run: uv sync --no-install-package async-tiff
 
       - name: maturin venv Build
         working-directory: python
         run: uv run --no-project maturin develop
 
-      # - name: Run pytest
-      #   working-directory: python
-      #   run: uv run --no-project pytest
+      - name: Run pytest
+        working-directory: python
+        run: uv run --no-project pytest --verbose
diff --git a/python/pyproject.toml b/python/pyproject.toml
index e7a225e..9a5a30a 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -33,7 +33,12 @@ dev-dependencies = [
     "numpy>=1",
     "obstore>=0.5.1",
     "pip>=24.2",
-    "pytest-asyncio>=0.24.0",
+    "pytest-asyncio>=0.26.0",
     "pytest>=8.3.3",
     "ruff>=0.8.4",
 ]
+
+[tool.pytest.ini_options]
+addopts = "--color=yes"
+asyncio_default_fixture_loop_scope="function"
+asyncio_mode = "auto"
diff --git a/python/tests/test_cog.py b/python/tests/test_cog.py
index 577a0bb..5aa7758 100644
--- a/python/tests/test_cog.py
+++ b/python/tests/test_cog.py
@@ -1,27 +1,25 @@
-import async_tiff
-from time import time
-from async_tiff import TIFF
+from async_tiff import TIFF, enums
 from async_tiff.store import S3Store
 
-store = S3Store("sentinel-cogs", region="us-west-2", skip_signature=True)
-path = "sentinel-s2-l2a-cogs/12/S/UF/2022/6/S2B_12SUF_20220609_0_L2A/B04.tif"
 
-tiff = await TIFF.open(path, store=store, prefetch=32768)
+async def test_cog_s3():
+    """
+    Ensure that TIFF.open can open a Sentinel-2 Cloud-Optimized GeoTIFF file from an
+    s3 bucket, read IFDs and GeoKeyDirectory metadata.
+    """
+    path = "sentinel-s2-l2a-cogs/12/S/UF/2022/6/S2B_12SUF_20220609_0_L2A/B04.tif"
+    store = S3Store("sentinel-cogs", region="us-west-2", skip_signature=True)
+    tiff = await TIFF.open(path=path, store=store, prefetch=32768)
 
-start = time()
-tiff = await TIFF.open(path, store=store, prefetch=32768)
-end = time()
-end - start
+    ifds = tiff.ifds
+    assert len(ifds) == 5
 
-ifds = tiff.ifds
-ifd = ifds[0]
-ifd.compression
-ifd.tile_height
-ifd.tile_width
-ifd.photometric_interpretation
-gkd = ifd.geo_key_directory
-gkd.citation
-gkd.projected_type
-gkd.citation
+    ifd = ifds[0]
+    assert ifd.compression == enums.CompressionMethod.Deflate
+    assert ifd.tile_height == 1024
+    assert ifd.tile_width == 1024
+    assert ifd.photometric_interpretation == enums.PhotometricInterpretation.BlackIsZero
 
-dir(gkd)
+    gkd = ifd.geo_key_directory
+    assert gkd.citation == "WGS 84 / UTM zone 12N"
+    assert gkd.projected_type == 32612
diff --git a/python/uv.lock b/python/uv.lock
index f869127..03de838 100644
--- a/python/uv.lock
+++ b/python/uv.lock
@@ -1,4 +1,5 @@
 version = 1
+revision = 1
 requires-python = ">=3.9"
 resolution-markers = [
     "python_full_version >= '3.10'",
@@ -68,7 +69,7 @@ dev = [
     { name = "obstore", specifier = ">=0.5.1" },
     { name = "pip", specifier = ">=24.2" },
     { name = "pytest", specifier = ">=8.3.3" },
-    { name = "pytest-asyncio", specifier = ">=0.24.0" },
+    { name = "pytest-asyncio", specifier = ">=0.26.0" },
     { name = "ruff", specifier = ">=0.8.4" },
 ]
 
@@ -1327,14 +1328,15 @@ wheels = [
 
 [[package]]
 name = "pytest-asyncio"
-version = "0.25.3"
+version = "0.26.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pytest" },
+    { name = "typing-extensions", marker = "python_full_version < '3.10'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f2/a8/ecbc8ede70921dd2f544ab1cadd3ff3bf842af27f87bbdea774c7baa1d38/pytest_asyncio-0.25.3.tar.gz", hash = "sha256:fc1da2cf9f125ada7e710b4ddad05518d4cee187ae9412e9ac9271003497f07a", size = 54239 }
+sdist = { url = "https://files.pythonhosted.org/packages/8e/c4/453c52c659521066969523e87d85d54139bbd17b78f09532fb8eb8cdb58e/pytest_asyncio-0.26.0.tar.gz", hash = "sha256:c4df2a697648241ff39e7f0e4a73050b03f123f760673956cf0d72a4990e312f", size = 54156 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/67/17/3493c5624e48fd97156ebaec380dcaafee9506d7e2c46218ceebbb57d7de/pytest_asyncio-0.25.3-py3-none-any.whl", hash = "sha256:9e89518e0f9bd08928f97a3482fdc4e244df17529460bc038291ccaf8f85c7c3", size = 19467 },
+    { url = "https://files.pythonhosted.org/packages/20/7f/338843f449ace853647ace35870874f69a764d251872ed1b4de9f234822c/pytest_asyncio-0.26.0-py3-none-any.whl", hash = "sha256:7b51ed894f4fbea1340262bdae5135797ebbe21d8638978e35d31c6d19f72fb0", size = 19694 },
 ]
 
 [[package]]