diff --git a/test_conformance/device_execution/execute_block.cpp b/test_conformance/device_execution/execute_block.cpp
index e10b7c6e..99589605 100644
--- a/test_conformance/device_execution/execute_block.cpp
+++ b/test_conformance/device_execution/execute_block.cpp
@@ -928,15 +928,16 @@ static const char* block_barrier[] =
     NL, "  size_t gid = get_group_id(0);"
     NL, "  size_t idx = gid*lsz;"
     NL, ""
+    NL, "  res[tid]=lsz;"
+    NL, "  barrier(CLK_GLOBAL_MEM_FENCE);"
     NL, "  int (^kernelBlock)(int) = ^(int a)"
     NL, "  {"
-    NL, "    atomic_inc(res+idx);"
+    NL, "    atomic_dec(res+idx);"
     NL, "    barrier(CLK_GLOBAL_MEM_FENCE);"
-    NL, "    return (int)abs(a - b) - (res[idx] != lsz ? 0 : 1);"
+    NL, "    return (int)abs(a - b) - (res[idx] != 0 ? 0 : 1);"
     NL, "  };"
     NL, ""
     NL, "  int d = kernelBlock(2);"
-    NL, "  barrier(CLK_GLOBAL_MEM_FENCE);"
     NL, "  res[tid] = d;"
     NL, "}"
     NL