diff --git a/src/operators/jax_operator.py b/src/operators/jax_operator.py
index 9db0e68b044e2d4d9b102d9e567a2fc15731a59a..5aa621c97f6ff50ad2c7abbc9a2a87da652750cc 100644
--- a/src/operators/jax_operator.py
+++ b/src/operators/jax_operator.py
@@ -15,11 +15,10 @@
 # Author: Philipp Arras
 
 import numpy as np
-from .operator import Operator
-from .energy_operators import EnergyOperator, LikelihoodEnergyOperator
-from .linear_operator import LinearOperator
-from .endomorphic_operator import EndomorphicOperator
 
+from .energy_operators import LikelihoodEnergyOperator
+from .linear_operator import LinearOperator
+from .operator import Operator
 
 try:
     import jax
@@ -60,8 +59,8 @@ class JaxOperator(Operator):
         self._fwd = jax.jit(lambda x, y: jax.jvp(self._func, (x,), (y,))[1])
 
     def apply(self, x):
-        from ..sugar import is_linearization, makeField
         from ..multi_domain import MultiDomain
+        from ..sugar import is_linearization, makeField
         self._check_input(x)
         if is_linearization(x):
             res, bwd = self._vjp(x.val.val)
@@ -137,9 +136,9 @@ class JaxLikelihoodEnergyOperator(LikelihoodEnergyOperator):
         return self._dt, self._trafo
 
     def apply(self, x):
+        from ..linearization import Linearization
         from ..sugar import is_linearization, makeField
         from .simple_linear_operators import VdotOperator
-        from ..linearization import Linearization
         self._check_input(x)
         lin = is_linearization(x)
         val = x.val.val if lin else x.val