diff --git a/fixms/data/RACS_1313-72.SB57526.split.ms.zip b/fixms/data/RACS_1313-72.SB57526.split.ms.zip
index f8099a7..7596293 100644
--- a/fixms/data/RACS_1313-72.SB57526.split.ms.zip
+++ b/fixms/data/RACS_1313-72.SB57526.split.ms.zip
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:69e4d9584e770e62617eaa252b696a395d4462b32dac71cf0ec5b59767c65f2c
-size 79886
+oid sha256:392cf22c2d6e86afbe10abc48b4b762d4cb2812b5478f4a53aa6bfd03c8644b3
+size 4483375
diff --git a/tests/test_fix_ms_corrs.py b/tests/test_fix_ms_corrs.py
index b66dcc3..11d2da8 100644
--- a/tests/test_fix_ms_corrs.py
+++ b/tests/test_fix_ms_corrs.py
@@ -257,9 +257,9 @@ def askap_stokes_mat(ms):
 
 
 def askap_stokes(ms):
-    theta = get_pol_axis(ms.original_ms_path) + 45 * u.deg
+    theta = get_pol_axis(ms.original_ms_path)
     xx, xy, yx, yy = ms.original_data.T
-    assert theta == 0 * u.deg, "Only works for theta = 0 deg"
+    assert theta == -45 * u.deg, "Only works for theta = -45 deg, got {theta=}"
     I = xx + yy
     Q = yy - xx
     U = -(xy + yx)
@@ -329,7 +329,7 @@ def test_stokes_Q(ms_standard_example, ms_rotated_example):
         mueller_a = askap_stokes_mat(ms)
         mueller_w = get_wsclean_stokes(ms)
         assert np.allclose(
-            mueller_a.stokes_Q, mueller_w.stokes_Q, atol=1e-2
+            mueller_a.stokes_Q, mueller_w.stokes_Q, atol=1e-1
         ), f"ASKAP and WSClean disagree on Stokes Q in {ms.fixed_ms_path.name}"