diff --git a/manualtest.cpp b/manualtest.cpp
index ab5537e..e26a762 100644
--- a/manualtest.cpp
+++ b/manualtest.cpp
@@ -86,6 +86,11 @@ int main()
     if (str[1] == 'i')
         std::cout << "String::operator[] works" << std::endl;
 
+    String sajtok = "sajtok";
+    sajtok[5] = sajtok[0];
+    if (!std::strcmp(sajtok.c_str(), "sajtos"))
+        std::cout << "String::operator[]'s operator= works with other String::operator[]s" << std::endl;
+
     try { str[8]; }
     catch (std::out_of_range)
     { std::cout << "String::operator[] throws when index is out of range" << std::endl; }
diff --git a/test.cpp b/test.cpp
index bc79be5..24c9a7b 100644
--- a/test.cpp
+++ b/test.cpp
@@ -173,7 +173,15 @@ TEST(StringTest, indexOperatorWorks)
     EXPECT_EQ(i, str[1]);
 }
 
-TEST(StringTest, indexoperatorBoundCheckWorks)
+TEST(StringTest, indexOperatorWorksWhenUsedWithOtherIndexOperators)
+{
+    String sajtok = "sajtok";
+    sajtok[5] = sajtok[0];
+
+    EXPECT_STREQ("sajtos", sajtok.c_str());
+}
+
+TEST(StringTest, indexOperatorBoundCheckWorks)
 {
     String str("sajt");