diff --git a/firmware/util/efilib.cpp b/firmware/util/efilib.cpp
index 71ceefac7e..d91a2c8c33 100644
--- a/firmware/util/efilib.cpp
+++ b/firmware/util/efilib.cpp
@@ -193,7 +193,6 @@ static char* itoa_signed(char *p, int num, unsigned radix) {
  * @return pointer at the end zero symbol after the digits
  */
 char* itoa10(char *p, int num) {
-// todo: unit test
 	return itoa_signed(p, num, 10);
 }
 
diff --git a/firmware/util/efilib.h b/firmware/util/efilib.h
index 36a167376c..a400ca0b86 100644
--- a/firmware/util/efilib.h
+++ b/firmware/util/efilib.h
@@ -74,6 +74,7 @@ int maxI(int i1, int i2);
 int minI(int i1, int i2);
 float maxF(float i1, float i2);
 float minF(float i1, float i2);
+// sometimes known as 'itoa'
 char* itoa10(char *p, int num);
 bool isSameF(float v1, float v2);
 
diff --git a/unit_tests/tests/test_util.cpp b/unit_tests/tests/test_util.cpp
index 89322e5a45..503b5eacc7 100644
--- a/unit_tests/tests/test_util.cpp
+++ b/unit_tests/tests/test_util.cpp
@@ -21,6 +21,12 @@
 #include "crc.h"
 #include "fl_stack.h"
 
+TEST(util, testitoa) {
+	char buffer[12];
+	itoa10(buffer, 239);
+	ASSERT_TRUE(strEqual(buffer, "239"));
+}
+
 TEST(util, negativeZero) {
 	ASSERT_TRUE(IS_NEGATIVE_ZERO(-0.0));