diff --git a/tests/test_cli.py b/tests/test_cli.py
index 3fc048585..00f33bb1c 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1522,7 +1522,7 @@ def test_annotate_file(self):
             ],
         )
         print("STDERR", result.stdout)
-        err = result.stderr
+        err = "\n".join([line for line in result.stderr.split("\n") if not line.startswith("WARNING")])
         self.assertEqual("", err)
         self.assertEqual(0, result.exit_code)
         with open(outfile) as stream:
diff --git a/tests/test_implementations/test_semsimian_implementation.py b/tests/test_implementations/test_semsimian_implementation.py
index fb1e32973..ce06b4857 100644
--- a/tests/test_implementations/test_semsimian_implementation.py
+++ b/tests/test_implementations/test_semsimian_implementation.py
@@ -1,6 +1,7 @@
 import os
 import timeit
 import unittest
+from importlib.util import find_spec
 
 from linkml_runtime.dumpers import yaml_dumper
 
@@ -31,6 +32,7 @@
 
 
 @unittest.skipIf(os.name == "nt", "DB path loading inconsistent on Windows")
+@unittest.skipIf(find_spec("semsimian") is None, "Semsimian not available")
 class TestSemSimianImplementation(unittest.TestCase):
     """Implementation tests for Rust-based semantic similarity."""
 
diff --git a/tests/test_selector.py b/tests/test_selector.py
index 35cb52364..ca75da5e8 100644
--- a/tests/test_selector.py
+++ b/tests/test_selector.py
@@ -6,8 +6,13 @@
 import unittest
 from pathlib import Path
 
-from gilda.grounder import Grounder
-from gilda.term import Term
+try:
+    from gilda.grounder import Grounder
+    from gilda.term import Term
+
+    have_gilda = True
+except ImportError:
+    have_gilda = False
 
 from oaklib.datamodels.text_annotator import TextAnnotationConfiguration
 from oaklib.implementations.gilda import GildaImplementation
@@ -23,6 +28,7 @@
 from tests import INPUT_DIR
 
 
+@unittest.skipIf(not have_gilda, "Gilda not available")
 class TestResource(unittest.TestCase):
     def test_from_descriptor(self):
         # no scheme