diff --git a/src/binary_c_python_api.c b/src/binary_c_python_api.c
index 50b9f2fdeb1f4d0840222761b9966f48fbc92ff3..87b827f19c35c64a760dbff6af35aa588f433be7 100644
--- a/src/binary_c_python_api.c
+++ b/src/binary_c_python_api.c
@@ -121,6 +121,8 @@ int run_system(char * argstring,
         stardata->preferences->custom_output_function = (void*)(struct stardata_t *)custom_logging_func_memaddr;
     }
 
+    printf("ensemble_defer: %d\n", stardata->preferences->ensemble_defer);
+
     /* do binary evolution */
     binary_c_evolve_for_dt(stardata,
                            stardata->model.max_evolution_time);
diff --git a/tests/test_return_persistent_data_memaddr.py b/tests/test_return_persistent_data_memaddr.py
index ddd2adfaaf325e84c81305db42740c6effd6fa3b..88124da6f367b63ddaf4e0404e9dd0c76318f4cd 100644
--- a/tests/test_return_persistent_data_memaddr.py
+++ b/tests/test_return_persistent_data_memaddr.py
@@ -175,7 +175,7 @@ def adding_ensemble_output():
 
     #############################################################################################
     # The 2 runs below use the ensemble and both defer the output so that after they are finished
-    # nothing is printed. After that we explicitly free the memory of the persistent_data and 
+    # nothing is printed. After that we explicitly free the memory of the persistent_data and
     # have the output returned in that way
 
     # Deferred commands
@@ -188,8 +188,14 @@ def adding_ensemble_output():
     persistent_data_memaddr = binary_c_python_api.return_persistent_data_memaddr()
 
     # Run the systems and defer the output each time
-    output_1_deferred = binary_c_python_api.run_system(argstring=argstring_1_deferred, persistent_data_memaddr=persistent_data_memaddr)
-    output_2_deferred = binary_c_python_api.run_system(argstring=argstring_2_deferred, persistent_data_memaddr=persistent_data_memaddr)
+    output_1_deferred = binary_c_python_api.run_system(
+        argstring=argstring_1_deferred,
+        persistent_data_memaddr=persistent_data_memaddr
+    )
+    output_2_deferred = binary_c_python_api.run_system(
+        argstring=argstring_2_deferred,
+        persistent_data_memaddr=persistent_data_memaddr
+    )
 
     # Have the persistent_memory adress be released and have the json outputted
     output_total_deferred = binary_c_python_api.free_persistent_data_memaddr_and_return_json_output(persistent_data_memaddr)
@@ -205,14 +211,20 @@ def adding_ensemble_output():
 
     #############################################################################################
     # The 2 runs below use the ensemble and the first one defers the output to the memory,
-    # Then the second one uses that memory to combine its results with, but doesn't defer the 
+    # Then the second one uses that memory to combine its results with, but doesn't defer the
     # data after that, so it will print it after the second run is done
 
     persistent_data_memaddr_2 = binary_c_python_api.return_persistent_data_memaddr()
 
     # Run the systems and defer the output once and the second time not, so that the second run automatically prints out the results
-    output_1_deferred = binary_c_python_api.run_system(argstring=argstring_1_deferred, persistent_data_memaddr=persistent_data_memaddr_2)
-    output_2_deferred_and_output = binary_c_python_api.run_system(argstring=argstring_2, persistent_data_memaddr=persistent_data_memaddr_2)
+    output_1_deferred = binary_c_python_api.run_system(
+        argstring=argstring_1_deferred,
+        persistent_data_memaddr=persistent_data_memaddr_2
+    )
+    output_2_deferred_and_output = binary_c_python_api.run_system(
+        argstring=argstring_2,
+        persistent_data_memaddr=persistent_data_memaddr_2
+    )
 
     ensemble_jsons_deferred_and_output = [line for line in output_2_deferred_and_output.splitlines() if line.startswith("ENSEMBLE_JSON")]