diff --git a/src/const/private/const.cpp b/src/const/private/const.cpp
index d97eed2..efa8f4b 100644
--- a/src/const/private/const.cpp
+++ b/src/const/private/const.cpp
@@ -82,7 +82,7 @@ bool constants::load(const std::string& filename) {
         int start = 0;
 
         std::string symbol       = trim(line.substr(start, col_widths_[0])); start += col_widths_[0];
-        std::string name         = line.substr(start, col_widths_[1]); start += col_widths_[1];
+        std::string name         = trim(line.substr(start, col_widths_[1])); start += col_widths_[1];
         std::string valueStr     = line.substr(start, col_widths_[2]); start += col_widths_[2];
         std::string unit         = trim(line.substr(start, col_widths_[3])); start += col_widths_[3]; // Only trim the unit
         std::string uncertaintyStr = line.substr(start, col_widths_[4]); start += col_widths_[4];
diff --git a/src/const/public/const.h b/src/const/public/const.h
index 2a44574..eae184c 100644
--- a/src/const/public/const.h
+++ b/src/const/public/const.h
@@ -16,6 +16,16 @@ struct constant {
   double uncertainty;       ///< Uncertainty in the constant's value
   std::string unit;         ///< Unit of the constant
   std::string reference;    ///< Reference for the constant's value
+
+  /**
+   * @brief overload the << operator for pretty printing
+   */
+   friend std::ostream& operator<<(std::ostream& os, const constant& c) {
+     os << "<" << c.name << ": ";
+     os << c.value << "±" << c.uncertainty << " ";
+     os << c.unit << " (" << c.reference << ")>\n";
+     return os;
+   }
 };
 
 /**
diff --git a/src/resources/const/const.dat b/src/resources/const/const.dat
index b6412ab..2d51028 100644
--- a/src/resources/const/const.dat
+++ b/src/resources/const/const.dat
@@ -428,7 +428,7 @@ mH_amu_rel                helion relative atomic mass
 h_shield_shift            helion shielding shift                                   5.99674300e-05                       1.00000000e-10 CODATA2022                                   
 F_hyperfine_Cs-133        hyperfine transition frequency of Cs-133                 9.19263177e+09 1 / s                 0.00000000e+00 CODATA2022                                   
 aSi_220_ideal             lattice spacing of ideal Si (220)                        1.92015572e-08 cm                    3.20000000e-16 CODATA2022                                   
-eta                       luminous efficacy                                        6.83000000e-05 s3 rad2 cd / (g cm2)  0.00000000e+00 CODATA2022                                   
+eta                       luminous efficacy                                        6.83000000e-05 s3 rad2 cd/(g cm2)    0.00000000e+00 CODATA2022                                   
 rg_n_MHz_T                neutron gyromag. ratio in MHz/T                          2.91646931e+01 MHz T^-1              6.90000000e-06 CODATA2022                                   
 mN_amu_rel                neutron relative atomic mass                             1.00866492e+00                       4.90000000e-10 CODATA2022                                   
 mu_N_invm                 nuclear magneton in inverse meter per tesla              2.54262341e-02 m^-1 T^-1             7.80000000e-12 CODATA2022                                   
diff --git a/tests/const/constTest.cpp b/tests/const/constTest.cpp
index 9fd3a05..5bfebe4 100644
--- a/tests/const/constTest.cpp
+++ b/tests/const/constTest.cpp
@@ -4,6 +4,7 @@
 #include <string>
 #include <vector>
 #include <set>
+#include <sstream>
 
 std::string RELATIVE_PATH = "../src/resources/const/const.dat";
 /**
@@ -22,7 +23,6 @@ protected:
     void SetUp() override {
         // Create a DObject with initial data and metadata
         constants initializedConstants(RELATIVE_PATH);
-        std::cout << "speed of light (tests) " << initializedConstants["c"].value << std::endl;
     }
 };
 
@@ -88,7 +88,6 @@ TEST_F(constTest, Keys) {
 
     for (const auto& key : checkKeys) {
         bool found = keys.find(key) != keys.end();
-        std::cout << "FOUND SIMILAR KEY " << key << ", found: " << found << std::endl;
         EXPECT_TRUE(found);
     }
 
@@ -101,7 +100,16 @@ TEST_F(constTest, Keys) {
 
     for (const auto& key : checkBadKeys) {
         bool found = keys.find(key) != keys.end();
-        std::cout << "FOUND BAD KEY " << key << ", found: " << found << std::endl;
         EXPECT_FALSE(found);
     }
+}
+
+TEST_F(constTest, Output) {
+    constants obj(RELATIVE_PATH);
+    std::ostringstream os;
+
+    os << obj.get("c");
+    std::string expected = "<speed of light in vacuum: 2.99792e+10±0 cm / s (CODATA2022)>\n";
+
+    EXPECT_EQ(os.str(), expected);
 }
\ No newline at end of file