diff --git a/lib/op-attrs/src/aggregate.cc b/lib/op-attrs/src/aggregate.cc
index c3b63b914c..883d6a2def 100644
--- a/lib/op-attrs/src/aggregate.cc
+++ b/lib/op-attrs/src/aggregate.cc
@@ -21,6 +21,18 @@ ParallelTensorShape
   return output_shape;
 }
 
+TensorShape
+    get_output_shape(AggregateAttrs const &attrs,
+                     TensorShape const &gate_preds,
+                     TensorShape const &gate_assign,
+                     TensorShape const &true_gate_assign,
+                     TensorShape const &full_gate_gradients,
+                     std::vector<TensorShape> const &exp_preds) {
+  TensorShape output_shape = exp_preds.at(0);
+  return output_shape;
+}
+
+
 bool is_valid(AggregateAttrs const &attrs,
               ParallelTensorShape const &gate_preds,
               ParallelTensorShape const &gate_assign,
diff --git a/lib/op-attrs/test/src/tensor_shape_inf.cc b/lib/op-attrs/test/src/tensor_shape_inf.cc
new file mode 100644
index 0000000000..34e966f14e
--- /dev/null
+++ b/lib/op-attrs/test/src/tensor_shape_inf.cc
@@ -0,0 +1,44 @@
+#include "doctest/doctest.h"
+#include "op-attrs/operator_attrs.h"
+#include "parallel_tensor_shape.h"
+#include <rapidcheck.h>
+
+using namespace FlexFlow;
+using namespace rc;
+
+ParallelTensorShape aggregate_parallel_helper(int n,
+                                              FFOrdered<ParallelDim> const &gate_pred_assign_dims,
+                                              FFOrdered<ParallelDim> const &full_gate_grad_dims,
+                                              FFOrdered<ParallelDim> const &exp_dims) {
+  AggregateAttrs attrs {n, lambda_bal: 1.0};
+  ParallelTensorShape gate_preds {gate_pred_assign_dims, DataType::FLOAT};
+  ParallelTensorShape gate_assign {gate_pred_assign_dims, DataType::INT32};
+  ParallelTensorShape true_gate_assign {gate_pred_assign_dims, DataType::INT32}; 
+  ParallelTensorShape full_gate_gradients {full_gate_grad_dims, DataType::FLOAT};
+  std::vector<ParallelTensorShape> exp_preds;
+  for (int i=0; i<n; ++i) {
+    exp_preds.push_back({exp_dims, DataType::FLOAT});
+  }
+  assert(is_valid(attrs, gate_preds, gate_assign, true_gate_assign, full_gate_gradients, exp_preds));
+  
+
+  return get_output_shape(attrs, gate_preds, gate_assign, true_gate_assign, full_gate_gradients, exp_preds);
+}
+
+TEST_CASE("1,AggregateAttrs:get_output_shape") {
+  int n = 12;
+  int k = 4;
+  int batch_size = 64;
+  int rows = 16;
+  int output_dim = 32;
+  AggregateAttrs attrs {n, lambda_bal: 1.0};
+
+  ParallelDim replica_dim {1, 1, true};
+  FFOrdered<ParallelDim> gate_pred_assign_dims {{k, 1, false}, {batch_size, 1, false}, replica_dim};
+  FFOrdered<ParallelDim> full_gate_grad_dims {{n, 1, false}, {batch_size, 1, false}, {1, 1, true}};
+  FFOrdered<ParallelDim> exp_dims {{output_dim, 1, false}, {rows, 1, false}, {1, 1, true}};
+  FFOrdered<ParallelDim> output_dims {{output_dim, 1, false}, {rows, 1, false}, replica_dim};
+  ParallelTensorShape correct_output {output_dims, DataType::FLOAT};
+
+  CHECK(aggregate_parallel_helper(n, gate_pred_assign_dims, full_gate_grad_dims, exp_dims) == correct_output);
+}
\ No newline at end of file