Let CI run without scikit-image

by skipping test_wfc_findsat_mrt and test_wfc_satdet

acstools/tests/test_wfc_findsat_mrt.py

@@ -1,11 +1,14 @@
 '''Test satellite trail detection and masking using findsat_mrt.'''
 import os
 
+import pytest
 from astropy.io.fits import FITSDiff
 from astropy.utils.data import get_pkg_data_filename
 
 from acstools.findsat_mrt import WfcWrapper
 
+pytest.importorskip("skimage")
+
 
 def test_WfcWrapper(tmp_path):
     """Identify and mask trails in WFC extension 4."""

acstools/tests/test_wfc_satdet.py

@@ -3,10 +3,14 @@
 .. note:: Cannot test ``detsat()`` because PHT results change from run to run!
 
 """
+import pytest
+
 from acstools import satdet
 from acstools.utils_findsat_mrt import update_dq
 from acstools.tests.helpers import BaseACSTOOLS
 
+pytest.importorskip("skimage")
+
 
 class TestSatDet(BaseACSTOOLS):
     detector = 'wfc'

setup.cfg

@@ -87,6 +87,8 @@ filterwarnings =
   # Ignore numpy 2.0 warning, see https://github.com/astropy/astropy/pull/15495
   # and https://github.com/scipy/scipy/pull/19275
   ignore:.*numpy\.core.*:DeprecationWarning
+  # Do not let broken scikit-image block the rest of test suite
+  ignore:skimage not installed
 
 [flake8]
 # Ignoring these for now: