diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index bd5b0c5..9912662 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,3 +34,9 @@ jobs:
       run: |
         micromamba activate TEST
         python -m pytest -rxs tests
+
+    - name: Doctests
+      shell: bash -l {0}
+      run: |
+        micromamba activate TEST
+        python -m pytest -s -rxs --doctest-modules -vv ctd
diff --git a/ctd/__init__.py b/ctd/__init__.py
index 489b9df..88076fc 100644
--- a/ctd/__init__.py
+++ b/ctd/__init__.py
@@ -15,7 +15,15 @@
     smooth,
     split,
 )
-from .read import from_bl, from_btl, from_cnv, from_edf, from_fsi, rosette_summary
+from .read import (
+    from_bl,
+    from_btl,
+    from_castaway_csv,
+    from_cnv,
+    from_edf,
+    from_fsi,
+    rosette_summary,
+)
 
 try:
     from ._version import __version__
@@ -28,6 +36,7 @@
     "despike",
     "from_bl",
     "from_btl",
+    "from_castaway_csv",
     "from_cnv",
     "from_edf",
     "from_fsi",
diff --git a/ctd/read.py b/ctd/read.py
index 773cebb..c0544f5 100644
--- a/ctd/read.py
+++ b/ctd/read.py
@@ -522,10 +522,10 @@ def from_castaway_csv(fname):
     --------
     >>> import ctd
     >>> cast = ctd.from_castaway_csv('tests/data/castaway_data.csv')
-    >>> downcast, upcast = cast.split() # Upcast often prefiltered
-    >>> fig, ax = plt.subplots()
-    >>> ax = downcast['temperature'].plot_cast()
-    >>> fig.show()
+    >>> cast.columns
+    Index(['depth', 'temperature', 'conductivity', 'specific_conductance',
+           'salinity', 'sound_velocity', 'density'],
+          dtype='object')
 
     """
     with open(fname) as file:
diff --git a/tests/data/castaway_data.csv b/tests/data/castaway_data.csv
old mode 100755
new mode 100644