diff --git a/.github/workflows/pydep.yml b/.github/workflows/pydep.yml
index befb9984..9b577a8d 100644
--- a/.github/workflows/pydep.yml
+++ b/.github/workflows/pydep.yml
@@ -26,6 +26,12 @@ jobs:
       run: |
         cat .github/workflows/etchosts.txt | sudo tee -a /etc/hosts
 
+    # daryl is a hack
+    - name: Create symlink
+      run: |
+        set -e
+        sudo ln -s `pwd` /opt/dep
+
     # setup conda-forge with micromamba
     - name: Setup Python
       uses: mamba-org/setup-micromamba@v1
diff --git a/tests/test_tillage.py b/tests/test_tillage.py
new file mode 100644
index 00000000..3d19897d
--- /dev/null
+++ b/tests/test_tillage.py
@@ -0,0 +1,25 @@
+"""Test pydep.tillage."""
+
+from pydep import tillage
+
+
+def test_simple():
+    """Test import of API."""
+    plants = ["C", "B", "W", "P"]
+    cfactors = list(range(1, 7))
+    zones = ["IA_NORTH", "IA_SOUTH", "KS_NORTH"]
+    for bp in plants:
+        for pp in plants:
+            for ap in plants:
+                for cfactor in cfactors:
+                    for zone in zones:
+                        res = tillage.make_tillage(
+                            0, zone, bp, pp, ap, cfactor, 1
+                        )
+                        assert res is not None
+
+
+def test_unknown_file():
+    """Test unknown file."""
+    res = tillage.make_tillage(0, "IA_NORTH", "q", "q", "q", 1, 1)
+    assert res == ""