diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 39a343c..6582f5e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt -r requirements-dev.txt
+          pip install -e '.[test]'
       - name: Setup ipfs
         uses: ibnesayeed/setup-ipfs@master
         with:
diff --git a/README.md b/README.md
index ed10cba..9bbb540 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,10 @@ To run the test suite:
 ```
 git clone https://github.com/spatial-image/spatial-image-multiscale
 cd spatial-image-multiscale
-pip install -r requirements.txt -r requirements-dev.txt
+pip install -e '.[test]'
+cid=$(grep 'IPFS_CID =' test/test_spatial_image_multiscale.py | cut -d ' ' -f 3 | tr -d '"')
+# Needs ipfs, e.g. https://docs.ipfs.io/install/ipfs-desktop/
+ipfs get -o ./test/data -- $cid
 pytest
 ```
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
deleted file mode 100644
index 622b33c..0000000
--- a/requirements-dev.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-pytest
-pytest-mypy
-fsspec
-ipfsspec
-zarr
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 9ebd00d..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-numpy
-xarray
-xarray-datatree
-spatial_image