diff --git a/river/covariance/emp.py b/river/covariance/emp.py
index 19ea8da7b2..5a25a765df 100644
--- a/river/covariance/emp.py
+++ b/river/covariance/emp.py
@@ -384,8 +384,3 @@ def update_many(self, X: pd.DataFrame):
                 self._inv_cov[min((fi, fj), (fj, fi))] = row[j]
 
         return self
-
-if __name__ == "__main__":
-    import doctest
-
-    doctest.testmod()
\ No newline at end of file