diff --git a/conftest.py b/conftest.py
index ee72480ac44..a23219aac1d 100644
--- a/conftest.py
+++ b/conftest.py
@@ -205,24 +205,10 @@ def cuda_param(val):
 @pytest.helpers.register
 def get_func_execution(func, func_mode):
     if func_mode == 'LLVM':
-        ex = pnlvm.execution.FuncExecution(func)
-
-        # Calling writeback here will replace parameter values
-        # with numpy instances that share memory with the binary
-        # structure used by the compiled function
-        ex.writeback_state_to_pnl()
-
-        return ex.execute
+        return pnlvm.execution.FuncExecution(func).execute
 
     elif func_mode == 'PTX':
-        ex = pnlvm.execution.FuncExecution(func)
-
-        # Calling writeback here will replace parameter values
-        # with numpy instances that share memory with the binary
-        # structure used by the compiled function
-        ex.writeback_state_to_pnl()
-
-        return ex.cuda_execute
+        return pnlvm.execution.FuncExecution(func).cuda_execute
 
     elif func_mode == 'Python':
         return func.function
@@ -232,29 +218,16 @@ def get_func_execution(func, func_mode):
 @pytest.helpers.register
 def get_mech_execution(mech, mech_mode):
     if mech_mode == 'LLVM':
-        ex = pnlvm.execution.MechExecution(mech)
-
-        # Calling writeback here will replace parameter values
-        # with numpy instances that share memory with the binary
-        # structure used by the compiled function
-        ex.writeback_state_to_pnl()
-
-        return ex.execute
+        return pnlvm.execution.MechExecution(mech).execute
 
     elif mech_mode == 'PTX':
-        ex = pnlvm.execution.MechExecution(mech)
-
-        # Calling writeback here will replace parameter values
-        # with numpy instances that share memory with the binary
-        # structure used by the compiled function
-        ex.writeback_state_to_pnl()
-
-        return ex.cuda_execute
+        return pnlvm.execution.MechExecution(mech).cuda_execute
 
     elif mech_mode == 'Python':
         def mech_wrapper(x):
             mech.execute(x)
             return mech.output_values
+
         return mech_wrapper
     else:
         assert False, "Unknown mechanism mode: {}".format(mech_mode)
diff --git a/psyneulink/core/llvm/execution.py b/psyneulink/core/llvm/execution.py
index 3f7318f0d3e..60e501b19da 100644
--- a/psyneulink/core/llvm/execution.py
+++ b/psyneulink/core/llvm/execution.py
@@ -113,29 +113,21 @@ def _get_compilation_param(self, name, init_method, arg):
                       _pretty_size(ctypes.sizeof(struct_ty)), ")",
                       "for", self._obj.name)
 
-
             if len(self._execution_contexts) == 1:
                 if name == '_state':
-                    self.writeback_state_to_pnl()
+                    self._copy_params_to_pnl(self._execution_contexts[0],
+                                             self._obj,
+                                             self._state_struct,
+                                             "llvm_state_ids")
+
                 elif name == '_param':
-                    self.writeback_params_to_pnl()
+                    self._copy_params_to_pnl(self._execution_contexts[0],
+                                             self._obj,
+                                             self._param_struct,
+                                             "llvm_param_ids")
 
         return struct
 
-    def writeback_state_to_pnl(self):
-
-        self._copy_params_to_pnl(self._execution_contexts[0],
-                                 self._obj,
-                                 self._state_struct,
-                                 "llvm_state_ids")
-
-    def writeback_params_to_pnl(self):
-
-        self._copy_params_to_pnl(self._execution_contexts[0],
-                                 self._obj,
-                                 self._param_struct,
-                                 "llvm_param_ids")
-
     def _copy_params_to_pnl(self, context, component, params, ids:str):
 
         for idx, attribute in enumerate(getattr(component, ids)):
@@ -222,12 +214,7 @@ def _enumerate_recurse(elements):
                             except ValueError:
                                 pass
 
-                    pnl_param.set(
-                        value,
-                        context=context,
-                        override=True,
-                        compilation_sync=True,
-                    )
+                    pnl_param.set(value, context=context, override=True, compilation_sync=True)
 
 
 class CUDAExecution(Execution):