diff --git a/src/dysh/fits/tests/test_gbtfitsload.py b/src/dysh/fits/tests/test_gbtfitsload.py
index c06d9592..25904c67 100644
--- a/src/dysh/fits/tests/test_gbtfitsload.py
+++ b/src/dysh/fits/tests/test_gbtfitsload.py
@@ -402,7 +402,7 @@ def test_contruct_integration_number(self):
         index_file = p / "AGBT20B_014_03.raw.vegas.A6.index"
         data_file = p / "AGBT20B_014_03.raw.vegas.A6.fits"
         g = gbtfitsload.GBTFITSLoad(data_file)
-        gbtidl_index = pd.read_csv(index_file, skiprows=10, delim_whitespace=True)
+        gbtidl_index = pd.read_csv(index_file, skiprows=10, sep="\s+")
         assert np.all(g._index["INTNUM"] == gbtidl_index["INT"])
 
     def test_getps_smoothref(self):