diff --git a/tests/cpp/engine/threaded_engine_test.cc b/tests/cpp/engine/threaded_engine_test.cc
index 405f3b30a176..4532da806d87 100644
--- a/tests/cpp/engine/threaded_engine_test.cc
+++ b/tests/cpp/engine/threaded_engine_test.cc
@@ -42,7 +42,7 @@
  * present the following workload
  *  n = reads.size()
  *  data[write] = (data[reads[0]] + ... data[reads[n]]) / n
- *  std::this_thread::sleep_for(std::chrono::microsecons(time));
+ *  std::this_thread::sleep_for(std::chrono::microseconds(time));
  */
 struct Workload {
   std::vector<int> reads;
@@ -76,7 +76,7 @@ void GenerateWorkload(int num_workloads, int num_var,
 /**
  * evaluate a single workload
  */
-void EvaluateWorload(const Workload& wl, std::vector<double>* data) {
+void EvaluateWorkload(const Workload &wl, std::vector<double> *data) {
   double tmp = 0;
   for (int i : wl.reads) tmp += data->at(i);
   data->at(wl.write) = tmp / (wl.reads.size() + 1);
@@ -88,9 +88,9 @@ void EvaluateWorload(const Workload& wl, std::vector<double>* data) {
 /**
  * evaluate a list of workload, return the time used
  */
-double EvaluateWorloads(const std::vector<Workload>& workloads,
-                      mxnet::Engine* engine,
-                      std::vector<double>* data) {
+double EvaluateWorkloads(const std::vector<Workload> &workloads,
+                         mxnet::Engine *engine,
+                         std::vector<double> *data) {
   using namespace mxnet;
   double t = dmlc::GetTime();
   std::vector<Engine::VarHandle> vars;
@@ -103,10 +103,10 @@ double EvaluateWorloads(const std::vector<Workload>& workloads,
   for (const auto& wl : workloads) {
     if (wl.reads.size() == 0) continue;
     if (engine == NULL) {
-      EvaluateWorload(wl, data);
+        EvaluateWorkload(wl, data);
     } else {
       auto func = [wl, data](RunContext ctx, Engine::CallbackOnComplete cb) {
-        EvaluateWorload(wl, data); cb();
+          EvaluateWorkload(wl, data); cb();
       };
       std::vector<Engine::VarHandle> reads;
       for (auto i : wl.reads) {
@@ -159,7 +159,7 @@ TEST(Engine, RandSumExpr) {
     std::vector<std::vector<double>> data(num_engine);
     for (int i = 0; i < num_engine; ++i) {
       data[i].resize(num_var, 1.0);
-      t[i] += EvaluateWorloads(workloads, engine[i], &data[i]);
+      t[i] += EvaluateWorkloads(workloads, engine[i], &data[i]);
     }
 
     for (int i = 1; i < num_engine; ++i) {