diff --git a/bytesconv_32_test.go b/bytesconv_32_test.go
index 90223c0..4c52ebb 100644
--- a/bytesconv_32_test.go
+++ b/bytesconv_32_test.go
@@ -17,6 +17,10 @@ func TestAppendUint(t *testing.T) {
 	testAppendUint(t, 0)
 	testAppendUint(t, 123)
 	testAppendUint(t, 0x7fffffff)
+
+	for i := 0; i < 2345; i++ {
+		testAppendUint(t, i)
+	}
 }
 
 func TestReadHexIntSuccess(t *testing.T) {
diff --git a/bytesconv_64_test.go b/bytesconv_64_test.go
index 0b068ff..d63a69d 100644
--- a/bytesconv_64_test.go
+++ b/bytesconv_64_test.go
@@ -17,6 +17,10 @@ func TestAppendUint(t *testing.T) {
 	testAppendUint(t, 0)
 	testAppendUint(t, 123)
 	testAppendUint(t, 0x7fffffffffffffff)
+
+	for i := 0; i < 2345; i++ {
+		testAppendUint(t, i)
+	}
 }
 
 func TestReadHexIntSuccess(t *testing.T) {