diff --git a/gstools/variogram/variogram.py b/gstools/variogram/variogram.py
index 77b9a2c2..7acce928 100644
--- a/gstools/variogram/variogram.py
+++ b/gstools/variogram/variogram.py
@@ -23,22 +23,13 @@
 )
 from gstools.variogram.binning import standard_bins
 
-if config.USE_RUST:
+if config.USE_RUST:  # pragma: no cover
     # pylint: disable=E0401
-    from gstools_core import (
-        variogram_directional as directional,  # pragma: no cover
-    )
-    from gstools_core import (
-        variogram_ma_structured as ma_structured,  # pragma: no cover
-    )
-    from gstools_core import (
-        variogram_structured as structured,  # pragma: no cover
-    )
-    from gstools_core import (
-        variogram_unstructured as unstructured,  # pragma: no cover
-    )
+    from gstools_core import variogram_directional as directional
+    from gstools_core import variogram_ma_structured as ma_structured
+    from gstools_core import variogram_structured as structured
+    from gstools_core import variogram_unstructured as unstructured
 else:
-    # pylint: disable=C0412
     from gstools.variogram.estimator import (
         directional,
         ma_structured,