diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
new file mode 100644
index 0000000..a7478f1
--- /dev/null
+++ b/.github/workflows/pythonpackage.yml
@@ -0,0 +1,40 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on:
+  push:
+    branches-ignore:
+      - main
+  pull_request:
+
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  pytest:
+
+    runs-on: ubuntu-latest
+    if: always()
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.x"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        sudo apt-get update
+        sudo apt-get -y install libhdf5-dev
+    - name: Install package
+      run: |
+        pip install -e . --no-binary h5netcdf --no-binary h5py
+        pip install pytest
+
+    - name: Test with pytest
+      run: |
+        pytest -vv
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index deaca3c..d95d99b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -174,4 +174,8 @@ cython_debug/
 .pypirc
 
 # Archives
-*.zip
\ No newline at end of file
+*.zip
+
+# Images generated from tests
+/tests/**/*.png
+/tests/*.png
\ No newline at end of file
diff --git a/tests/test_selectors.py b/tests/test_selectors.py
deleted file mode 100644
index 05da82c..0000000
--- a/tests/test_selectors.py
+++ /dev/null
@@ -1,2029 +0,0 @@
-#!/usr/bin/env python3
-
-import xhermes
-import pytest
-import numpy.testing as npt
-
-from urllib.request import urlretrieve
-import zipfile
-
-Rcoords = {}
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-        1.6624084889116495,
-    ],
-    [
-        1.3332194053011495,
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-        1.6667805947007435,
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-        1.6668853245103719,
-    ],
-    [
-        1.3262059970526672,
-        1.327321769486699,
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-        1.326100458743324,
-        1.6737940029616882,
-        1.6726782304712706,
-        1.6727173530738773,
-        1.6738995412702466,
-    ],
-]
-Rcoords["yguards"]["ldn"] = [
-    [
-        1.351098589384265,
-        1.3521788839426898,
-        1.3533257052197223,
-        1.3521379085718201,
-        1.6477562750728374,
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-    ],
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-    ],
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-    ],
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-    ],
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-        1.331652219482794,
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-        1.6670160123899918,
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-    ],
-    [
-        1.325637101434888,
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-        1.6730196598870926,
-        1.6718605754443987,
-        1.6732858083217452,
-        1.674468486575013,
-    ],
-]
-Rcoords["yguards"]["lsn"] = [
-    [1.3455252435239562, 1.3493913431172626, 1.6506702768032917, 1.6547205511460767],
-    [1.3425532770504351, 1.346443053635181, 1.6536188989082803, 1.6576942096655574],
-    [1.3404368903769044, 1.3443429453238698, 1.6557192340619036, 1.6598117702341173],
-    [1.338925315823088, 1.34284270483694, 1.657219631564172, 1.661324167739766],
-    [1.3377748575335655, 1.341700711364507, 1.6583617417946508, 1.6624752438698642],
-    [1.336706063997912, 1.34063965769189, 1.6594229018356115, 1.6635446048797216],
-    [1.3352449096822347, 1.3391888928159235, 1.6608738088927946, 1.6650065249773132],
-    [1.3327264863239994, 1.3366878627506917, 1.663375075392321, 1.6675262415778205],
-    [1.3284609854072722, 1.332450371230052, 1.6676129431407054, 1.6717938547846003],
-    [1.321780904871205, 1.3258106290864096, 1.6742532160786563, 1.678477031369694],
-]
-Rcoords["yguards"]["usn"] = [
-    [1.654474756464572, 1.6506086568630587, 1.3493297231775065, 1.345279448841912],
-    [1.657446722937884, 1.6535569463448578, 1.3463811010722373, 1.342305790322168],
-    [1.6595631096115744, 1.6556570546563525, 1.3442807659187972, 1.3401882297537804],
-    [1.6610746841654018, 1.6571572951433449, 1.342780368416595, 1.3386758322481422],
-    [1.6622251424547962, 1.6582992886156418, 1.3416382581859838, 1.3375247561179078],
-    [1.6632939359913206, 1.6593603422881587, 1.3405770981445706, 1.336455395107964],
-    [1.6647550903098085, 1.660811107163892, 1.3391261910871552, 1.3349934750101897],
-    [1.6672735136551695, 1.6633121372294644, 1.3366249245879676, 1.3324737584099309],
-    [1.6715390145846454, 1.6675496287466045, 1.3323870568360807, 1.3282061452488694],
-    [1.678219095092287, 1.674189370899626, 1.3257467839070638, 1.3215229686179963],
-]
-Rcoords["yguards"]["udn2"] = [
-    [
-        1.3566478664544601,
-        1.3579988496006845,
-        1.3520257471569581,
-        1.350881782386862,
-        1.6490162315839503,
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-        1.334744892249557,
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-        1.3338103467451938,
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-    ],
-    [
-        1.332978201463924,
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-        1.3236070653154028,
-        1.6762871987196204,
-        1.6751696686902786,
-        1.665668477061708,
-        1.6671536520677814,
-    ],
-    [
-        1.332292062597162,
-        1.333693768398807,
-        1.3240944356958433,
-        1.3229096511401175,
-        1.6769845442293456,
-        1.6758663519569519,
-        1.6663536557762033,
-        1.6678398905493939,
-    ],
-    [
-        1.331768179431066,
-        1.3331706266541552,
-        1.3235625342279993,
-        1.3223772182321727,
-        1.6775169255474114,
-        1.676398237610659,
-        1.666876821096251,
-        1.6683638483146104,
-    ],
-]
-
-
-@pytest.fixture(scope="session")
-def example_grids(tmp_path_factory):
-    # Pytest fixture to make temporary directory
-    # the decorator makes sure the files are only used for this session
-    # and don't break stuff
-    tmp = tmp_path_factory.mktemp("hypnotoad")
-    url = "https://zenodo.org/records/17966926/files/Hypnotoad_examples.zip"
-    urlretrieve(url, "Hypnotoad_examples.zip")
-    with zipfile.ZipFile("Hypnotoad_examples.zip", "r") as z:
-        z.extractall(tmp)
-
-    return tmp
-
-
-def test_selectors(example_grids):
-    grids = dict(
-        cdn=example_grids / "example_cdn.grd.nc",
-        cdn_noguards=example_grids / "example_cdn_noguards.grd.nc",
-        ldn=example_grids / "example_ldn.grd.nc",
-        ldn_noguards=example_grids / "example_ldn_noguards.grd.nc",
-        lsn=example_grids / "example_lsn.grd.nc",
-        lsn_noguards=example_grids / "example_lsn_noguards.grd.nc",
-        usn=example_grids / "example_usn.grd.nc",
-        usn_noguards=example_grids / "example_usn_noguards.grd.nc",
-        udn2=example_grids / "example_udn2.grd.nc",
-        udn2_noguards=example_grids / "example_udn2_noguards.grd.nc",
-    )
-
-    for selection in Rcoords.keys():
-        for geometry in Rcoords[selection].keys():
-            expected = Rcoords[selection][geometry]
-            ds = xhermes.HypnotoadGrid(grids[geometry])
-            test = ds["Rxy"][xhermes.slice_2d(ds, selection)]
-
-            npt.assert_array_equal(
-                test,
-                expected,
-                err_msg=f"Selector mismatch for {selection} in {geometry}!",
-            )