diff --git a/firedrake/adjoint_utils/blocks/function.py b/firedrake/adjoint_utils/blocks/function.py
index 62b63108d9..26c3fef85c 100644
--- a/firedrake/adjoint_utils/blocks/function.py
+++ b/firedrake/adjoint_utils/blocks/function.py
@@ -139,7 +139,7 @@ def solve_tlm(self):
             tlm_dep = block_variable.tlm_value
             if tlm_dep is not None:
                 tlm_rhs = tlm_rhs + ufl.derivative(expr, dep, tlm_dep)
-                
+
         x.tlm_value = None
         if isinstance(tlm_rhs, int) and tlm_rhs == 0:
             return
diff --git a/firedrake/adjoint_utils/blocks/solving.py b/firedrake/adjoint_utils/blocks/solving.py
index 3790a83860..2ca1c86c92 100644
--- a/firedrake/adjoint_utils/blocks/solving.py
+++ b/firedrake/adjoint_utils/blocks/solving.py
@@ -326,7 +326,7 @@ def solve_tlm(self):
 
         tlm_rhs = 0
         tlm_bcs = []
-        for block_variable in self.get_dependencies():            
+        for block_variable in self.get_dependencies():
             dep = block_variable.output
             if dep == x.output:
                 continue