diff --git a/recirq/qcqmc/experiment.py b/recirq/qcqmc/experiment.py
index 6fb45cca..c8fad403 100644
--- a/recirq/qcqmc/experiment.py
+++ b/recirq/qcqmc/experiment.py
@@ -65,7 +65,7 @@ def path_string(self) -> str:
 
     def _json_dict_(self):
         simple_dict = attrs.asdict(self)
-        simple_dict["blueprint_params"] = cirq.to_json(self.blueprint_params)
+        simple_dict["blueprint_params"] = self.blueprint_params
         return simple_dict
 
 
@@ -87,7 +87,7 @@ class ExperimentData(data.Data):
 
     def _json_dict_(self):
         simple_dict = attrs.asdict(self)
-        simple_dict["params"] = self.params._json_dict_()  # type: ignore
+        simple_dict["params"] = self.params
         return simple_dict
 
 
diff --git a/recirq/qcqmc/experiment_test.py b/recirq/qcqmc/experiment_test.py
index f2cef5b2..40cfe5a5 100644
--- a/recirq/qcqmc/experiment_test.py
+++ b/recirq/qcqmc/experiment_test.py
@@ -48,5 +48,4 @@ def test_small_experiment_raw_samples_shape(
     assert raw_samples.shape == (17, 31, 4)
 
     exp2 = cirq.read_json(json_text=cirq.to_json(experiment))
-    print(exp2)
     assert exp2 == experiment