diff --git a/src/mlpack/tests/split_data_test.cpp b/src/mlpack/tests/split_data_test.cpp
index a69e2a2620..8de9d5f66b 100644
--- a/src/mlpack/tests/split_data_test.cpp
+++ b/src/mlpack/tests/split_data_test.cpp
@@ -289,7 +289,7 @@ TEST_CASE("StratifiedSplitDataResultTest", "[SplitDataTest]")
  */
 TEST_CASE("StratifiedSplitLargerDataResultTest", "[SplitDataTest]")
 {
-  mat input(3,480);
+  mat input(3, 480);
   input.randu();
 
   // 256 0s, 128 1s, 64 2s and 32 3s.