diff --git a/platformio/commands/check/command.py b/platformio/commands/check/command.py
index 2542ce17..03e5a018 100644
--- a/platformio/commands/check/command.py
+++ b/platformio/commands/check/command.py
@@ -165,7 +165,7 @@ def results_to_json(raw):
             {
                 "ignored": item.get("succeeded") is None,
                 "succeeded": bool(item.get("succeeded")),
-                "defects": [d.to_json() for d in item.get("defects", [])]
+                "defects": [d.as_dict() for d in item.get("defects", [])]
             }
         )
         results.append(item)
diff --git a/platformio/commands/check/defect.py b/platformio/commands/check/defect.py
index adef3666..c28e60c1 100644
--- a/platformio/commands/check/defect.py
+++ b/platformio/commands/check/defect.py
@@ -81,7 +81,7 @@ class DefectItem(object):
                 return key
         raise Exception("Unknown severity label -> %s" % label)
 
-    def to_json(self):
+    def as_dict(self):
         return {
             "severity": self.SEVERITY_LABELS[self.severity],
             "category": self.category,