diff --git a/cvs/models/rccl.py b/cvs/models/rccl.py
index 167c62e..54dca02 100644
--- a/cvs/models/rccl.py
+++ b/cvs/models/rccl.py
@@ -22,7 +22,7 @@ class RcclTests(BaseModel):
     model_config = ConfigDict(frozen=True)
     numCycle: NonNegativeInt
     name: Collective
-    size: PositiveInt
+    size: NonNegativeInt
     type: Type
     redop: Redop
     inPlace: InPlace
@@ -138,7 +138,7 @@ class RcclTestsAggregated(BaseModel):
     # Grouping keys
     model_config = ConfigDict(frozen=True, populate_by_name=True)
     name: Collective = Field(alias='collective')
-    size: PositiveInt
+    size: NonNegativeInt
     type: Type
     inPlace: InPlace