Use one of the already existing test fonts

tests/test_uharfbuzz.py

@@ -8,7 +8,6 @@
 TESTDATA = Path(__file__).parent / "data"
 ADOBE_BLANK_TTF_PATH = TESTDATA / "AdobeBlank.subset.ttf"
 OPEN_SANS_TTF_PATH = TESTDATA / "OpenSans.subset.ttf"
-SOURCE_SANS_PRO_OTF_PATH = TESTDATA / "SourceSansPro-Regular.otf"
 MUTATOR_SANS_TTF_PATH = TESTDATA / "MutatorSans-VF.subset.ttf"
 SPARSE_FONT_TTF_PATH = TESTDATA / "SparseFont.ttf"
 MATH_FONT_TTF_PATH = TESTDATA / "STIXTwoMath-Regular.ttf"
@@ -35,15 +34,6 @@ def blankfont():
     return font
 
 
-@pytest.fixture
-def sourcesance():
-    """Returns the full Source sans Pro Regular font."""
-    blob = hb.Blob.from_file_path(SOURCE_SANS_PRO_OTF_PATH)
-    face = hb.Face(blob)
-    font = hb.Font(face)
-    return font
-
-
 @pytest.fixture
 def opensans():
     """Return a subset of OpenSans.ttf containing the following glyphs/characters:
@@ -883,11 +873,10 @@ def test_ot_layout_script_get_language_tags(self, blankfont):
 
 
 class TestGetAlternates:
-    def test_ot_layout_lookup_get_glyph_alternates(self, sourcesance):
-        alternate_glyphs = hb.ot_layout_lookup_get_glyph_alternates(
-            sourcesance.face, 1, 1091
-        )
-        assert alternate_glyphs == [1549, 1620, 1606, 1578, 1592, 1103, 1115]
+    def test_ot_layout_lookup_get_glyph_alternates(self, blankfont):
+        gid = blankfont.get_nominal_glyph(ord("c"))
+        alternates = hb.ot_layout_lookup_get_glyph_alternates(blankfont.face, 1, gid)
+        assert alternates == [1]
 
 
 class TestOTMath: