diff --git a/rct_optimizations/test/pnp_utest.cpp b/rct_optimizations/test/pnp_utest.cpp
index a66a7b03..7de8564a 100644
--- a/rct_optimizations/test/pnp_utest.cpp
+++ b/rct_optimizations/test/pnp_utest.cpp
@@ -32,7 +32,7 @@ TEST(PNP_2D, PerfectInitialConditions)
   EXPECT_LT(result.initial_cost_per_obs, 1.0e-15);
   EXPECT_LT(result.final_cost_per_obs, 1.0e-15);
 
-  Eigen::IOFormat fmt(4, 0, ", ", "\n", "[", "]");
+  Eigen::IOFormat fmt(4, 0, " | ", "\n", "|", "|");
   std::cout << "Covariance:\n" << result.camera_to_target_covariance.format(fmt) << std::endl;
 }
 
@@ -61,7 +61,7 @@ TEST(PNP_2D, PerturbedInitialCondition)
   EXPECT_TRUE(result.camera_to_target.isApprox(camera_to_target, 1.0e-8));
   EXPECT_LT(result.final_cost_per_obs, 1.0e-15);
 
-  Eigen::IOFormat fmt(4, 0, ", ", "\n", "[", "]");
+  Eigen::IOFormat fmt(4, 0, " | ", "\n", "|", "|");
   std::cout << "Covariance:\n" << result.camera_to_target_covariance.format(fmt) << std::endl;
 }
 
@@ -100,7 +100,7 @@ TEST(PNP_2D, BadIntrinsicParameters)
   EXPECT_FALSE(result.camera_to_target.isApprox(camera_to_target, 1.0e-3));
   EXPECT_GT(result.final_cost_per_obs, 1.0e-3);
 
-  Eigen::IOFormat fmt(4, 0, ", ", "\n", "[", "]");
+  Eigen::IOFormat fmt(4, 0, " | ", "\n", "|", "|");
   std::cout << "Covariance:\n" << result.camera_to_target_covariance.format(fmt) << std::endl;
 }