diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index 49c7ead4234..12e64237248 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -4281,12 +4281,13 @@ String String::pad_zeros(int p_digits) const {
 		begin++;
 	}
 
-	if (begin >= end) {
-		return s;
-	}
-
 	int zeros_to_add = p_digits - (end - begin);
-	return s.insert(begin, String("0").repeat(zeros_to_add));
+
+	if (zeros_to_add <= 0) {
+		return s;
+	} else {
+		return s.insert(begin, String("0").repeat(zeros_to_add));
+	}
 }
 
 String String::trim_prefix(const String &p_prefix) const {
diff --git a/tests/core/string/test_string.h b/tests/core/string/test_string.h
index 5a2f8714305..93b237788db 100644
--- a/tests/core/string/test_string.h
+++ b/tests/core/string/test_string.h
@@ -1095,7 +1095,9 @@ TEST_CASE("[String] pad") {
 
 	s = String("10.10");
 	CHECK(s.pad_decimals(4) == U"10.1000");
+	CHECK(s.pad_decimals(1) == U"10.1");
 	CHECK(s.pad_zeros(4) == U"0010.10");
+	CHECK(s.pad_zeros(1) == U"10.10");
 }
 
 TEST_CASE("[String] is_subsequence_of") {