diff --git a/tests/core/pistringTest.cpp b/tests/core/pistringTest.cpp
index 3702520b..fd1c0eff 100644
--- a/tests/core/pistringTest.cpp
+++ b/tests/core/pistringTest.cpp
@@ -394,3 +394,63 @@ TEST(PIString_Tests, operator_less_eq_pistring_true){
 	PIString str2 = "testing";
 	ASSERT_TRUE(str1 <= str2);
 }
+
+TEST(PIString_Tests, operator_less_eq_pistring_false){
+	PIString str1 = "testing";
+	PIString str2 = "testin";
+	ASSERT_FALSE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_pistring_true_equal){
+	PIString str1 = "testing";
+	PIString str2 = "testing";
+	ASSERT_TRUE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_pichar_true){
+	PIString str1 = "a";
+	PIChar str2 = "t";
+	ASSERT_TRUE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_pichar_false){
+	PIString str1 = "t";
+	PIChar str2 = "a";
+	ASSERT_FALSE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_pichar_true_equal){
+	PIString str1 = "t";
+	PIChar str2 = "t";
+	ASSERT_TRUE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_cstring_true){
+	PIString str1 = "a";
+	char str2[] = "t";
+	ASSERT_TRUE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_cstring_false){
+	PIString str1 = "t";
+	char str2[] = "a";
+	ASSERT_FALSE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_less_eq_cstring_true_equal){
+	PIString str1 = "t";
+	char str2[] = "t";
+	ASSERT_TRUE(str1 <= str2);
+}
+
+TEST(PIString_Tests, operator_more_eq_pistring_true){
+	PIString str1 = "testin";
+	PIString str2 = "testing";
+	ASSERT_TRUE(str2 >= str1);
+}
+
+TEST(PIString_Tests, operator_more_eq_pistring_false){
+	PIString str1 = "testing";
+	PIString str2 = "testin";
+	ASSERT_FALSE(str2 >= str1);
+}