diff --git a/example/main.c b/example/main.c
index dcf3cf5..c63c5a5 100644
--- a/example/main.c
+++ b/example/main.c
@@ -89,14 +89,14 @@ shellmatta_retCode_t writeFct(const char* data, uint32_t length)
 int main(void)
 {
    static char buffer[1024];
-    static char historyBuffer[0];
+    static char historyBuffer[4096];
     static shellmatta_instance_t instance;
 
 //    initscr();
 //    raw();
 //    keypad(stdscr, TRUE);
 //    noecho();
-    f = open("/dev/pts/5", O_RDWR | O_SYNC);
+    f = open("/dev/pts/1", O_RDWR | O_SYNC);
 
     if (f < 0)
     {
diff --git a/test/shellmatta_utils/insertChars.cpp b/test/shellmatta_utils/insertChars.cpp
index 584622c..30345d6 100644
--- a/test/shellmatta_utils/insertChars.cpp
+++ b/test/shellmatta_utils/insertChars.cpp
@@ -21,7 +21,7 @@ TEST_CASE( "shellmatta_insertChars normal call" ) {
 
     utils_insertChars(&inst, "blksdflsd kfjlk", 4);
 
-    CHECK( inst.cursor == 4);
-    REQUIRE( inst.inputCount == 4);
+    CHECK( inst.cursor == 12);
+    REQUIRE( inst.inputCount == 14);
 }
 
diff --git a/test/shellmatta_utils/itoa.cpp b/test/shellmatta_utils/itoa.cpp
index b6639bd..a531070 100644
--- a/test/shellmatta_utils/itoa.cpp
+++ b/test/shellmatta_utils/itoa.cpp
@@ -2,10 +2,51 @@
 #include "src/shellmatta_utils.c"
 #include <string.h>
 
-TEST_CASE( "shellmatta_utils.c itoa - 123456" ) {
+TEST_CASE( "shellmatta_utils.c - itoa - 123456 base 10" ) {
     char buffer[64];
     memset(buffer, 0, sizeof(buffer));
-    CHECK( utils_shellItoa(123456, buffer, 16) == 5 );
-    CHECK( "12345" == "12345");
+    CHECK( utils_shellItoa(123456, buffer, 10) == 6 );
     REQUIRE( strcmp(buffer, "123456") == 0);
 }
+
+TEST_CASE( "shellmatta_utils.c - itoa - 0x0ABBCCDD base 16") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(0x0ABBCCDD, buffer, 16) == 7 );
+    REQUIRE( strcmp(buffer, "ABBCCDD") == 0);
+}
+
+TEST_CASE( "shellmatta_utils.c - itoa - -574236 base 10") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(-574236, buffer, 10) == 7 );
+    REQUIRE( strcmp(buffer, "-574236") == 0);
+}
+
+TEST_CASE( "shellmatta_utils.c - itoa - 0x80000000 base 2") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(0x80000000, buffer, 2) == 33 );
+    REQUIRE( strcmp(buffer, "-10000000000000000000000000000000") == 0);
+}
+
+TEST_CASE( "shellmatta_utils.c - itoa - 0x7FFFFFFF base 2") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(0x7FFFFFFF, buffer, 2) == 31 );
+    REQUIRE( strcmp(buffer, "1111111111111111111111111111111") == 0);
+}
+
+TEST_CASE( "shellmatta_utils.c - itoa - 0x7FFFFFFF base 1 - wrong base") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(0x7FFFFFFF, buffer, 1) == 0 );
+    REQUIRE( strcmp(buffer, "\0") == 0);
+}
+
+TEST_CASE( "shellmatta_utils.c - itoa - 0x7FFFFFFF base 17 - wrong base") {
+    char buffer[64];
+    memset(buffer, 0, sizeof(buffer));
+    CHECK( utils_shellItoa(0x7FFFFFFF, buffer, 17) == 0 );
+    REQUIRE( strcmp(buffer, "\0") == 0);
+}