diff --git a/beetsplug/thumbnails.py b/beetsplug/thumbnails.py
index 22f37551b..28d5ece0a 100644
--- a/beetsplug/thumbnails.py
+++ b/beetsplug/thumbnails.py
@@ -241,6 +241,8 @@ class GioURI(URIGetter):
     def get_library(self):
         lib_name = ctypes.util.find_library("gio-2")
         try:
+            if not lib_name:
+                return False
             return ctypes.cdll.LoadLibrary(lib_name)
         except OSError:
             return False
diff --git a/test/test_thumbnails.py b/test/test_thumbnails.py
index b2c16f0e8..4cb597645 100644
--- a/test/test_thumbnails.py
+++ b/test/test_thumbnails.py
@@ -265,7 +265,7 @@ class ThumbnailsTest(unittest.TestCase, TestHelper):
         gio = GioURI()
         plib = PathlibURI()
         if not gio.available:
-            self.skip("GIO library not found")
+            self.skipTest("GIO library not found")
 
         self.assertEqual(gio.uri("/foo"), b"file:///")  # silent fail
         self.assertEqual(gio.uri(b"/foo"), b"file:///foo")