diff --git a/bob/bio/base/test/utils.py b/bob/bio/base/test/utils.py
index 1679ff664c5f2a5cc4a94b9d1459ed34d0a52d97..504de81491b73257760e9ad4e684a61d10984383 100644
--- a/bob/bio/base/test/utils.py
+++ b/bob/bio/base/test/utils.py
@@ -146,7 +146,9 @@ def is_library_available(library):
 
                 return function(*args, **kwargs)
             except ImportError as e:
-                raise SkipTest("Skipping test since `mxnet` is not available: %s" % e)
+                raise SkipTest(
+                    f"Skipping test since `{library}` is not available: %s" % e
+                )
 
         return wrapper