diff --git a/group/group_inclusive_scan_upstream.cpp b/group/group_inclusive_scan_upstream.cpp
index 88aeddf..88257f3 100644
--- a/group/group_inclusive_scan_upstream.cpp
+++ b/group/group_inclusive_scan_upstream.cpp
@@ -9,7 +9,7 @@ class MicroBenchGroupInclusiveScanKernel;
 /**
  * Microbenchmark benchmarking group_reduce
  */
-template <typename DataT, int Iterations = 10000>
+template <typename DataT, int Iterations = 1000>
 class MicroBenchGroupInclusiveScan {
 protected:
   BenchmarkArgs args;
diff --git a/group/group_reduce.cpp b/group/group_reduce.cpp
index 4cec845..d1472e6 100644
--- a/group/group_reduce.cpp
+++ b/group/group_reduce.cpp
@@ -10,7 +10,7 @@ class MicroBenchGroupReduceKernel;
 /**
  * Microbenchmark benchmarking group_reduce/aaaax
  */
-template <typename DataT, bool IsVector = false, int Iterations = 10000>
+template <typename DataT, bool IsVector = false, int Iterations = 100000>
 class MicroBenchGroupReduce {
 protected:
   BenchmarkArgs args;
diff --git a/group/group_reduce_upstream.cpp b/group/group_reduce_upstream.cpp
index 053a40a..0c36ae3 100644
--- a/group/group_reduce_upstream.cpp
+++ b/group/group_reduce_upstream.cpp
@@ -9,7 +9,7 @@ class MicroBenchGroupReduceKernel;
 /**
  * Microbenchmark benchmarking group_reduce/aaaax
  */
-template <typename DataT, bool IsVector = false, int Iterations = 10000>
+template <typename DataT, bool IsVector = false, int Iterations = 1000>
 class MicroBenchGroupReduce {
 protected:
   BenchmarkArgs args;