diff --git a/src/api/exchanges/test/bithumb_place_order_test.cpp b/src/api/exchanges/test/bithumb_place_order_test.cpp
index f6ffa961..3bb20abb 100644
--- a/src/api/exchanges/test/bithumb_place_order_test.cpp
+++ b/src/api/exchanges/test/bithumb_place_order_test.cpp
@@ -41,14 +41,14 @@ TEST_F(BithumbPrivateAPIPlaceOrderTest, PlaceOrderShortenDecimals) {
       {/// Place order, with high number of decimals
        {"/trade/"
         "place?endpoint=%2Ftrade%2Fplace&order_currency=ETH&payment_currency=EUR&type=ask&price=1500&units=2.000001",
-        "{\"status\": \"5600\", \"message\":\"수량은 소수점 4자\"}"},
+        R"({"status": "5600", "message":"수량은 소수점 4자"})"},
        /// Replace order with decimals correctly truncated
        {"/trade/"
         "place?endpoint=%2Ftrade%2Fplace&order_currency=ETH&payment_currency=EUR&type=ask&price=1500&units=2",
-        "{\"status\": \"0000\", \"order_id\": \"ID0001\"}"},
+        R"({"status": "0000", "order_id": "ID0001"})"},
        /// Query once order info, order not matched
        {"/info/orders?endpoint=%2Finfo%2Forders&order_currency=ETH&payment_currency=EUR&type=ask&order_id=ID0001",
-        "{\"status\": \"0000\", \"data\": [{\"order_id\": \"ID0001\"}]}"}});
+        R"({"status": "0000", "data": [{"order_id": "ID0001"}]})"}});
 
   PlaceOrderInfo placeOrderInfo =
       placeOrder(MonetaryAmount("2.000001ETH"), MonetaryAmount("1500EUR"), TradeSide::kSell);
@@ -60,7 +60,7 @@ TEST_F(BithumbPrivateAPIPlaceOrderTest, NoPlaceOrderTooSmallAmount) {
       {/// Place order, with high number of decimals
        {"/trade/"
         "place?endpoint=%2Ftrade%2Fplace&order_currency=ETH&payment_currency=EUR&type=ask&price=1500&units=0.000001",
-        "{\"status\": \"5600\", \"message\":\"수량은 소수점 4자\"}"}});
+        R"({"status": "5600", "message":"수량은 소수점 4자"})"}});
 
   PlaceOrderInfo placeOrderInfo =
       placeOrder(MonetaryAmount("0.000001ETH"), MonetaryAmount("1500EUR"), TradeSide::kSell);
diff --git a/src/objects/src/logginginfo.cpp b/src/objects/src/logginginfo.cpp
index f36574fb..47c106dd 100644
--- a/src/objects/src/logginginfo.cpp
+++ b/src/objects/src/logginginfo.cpp
@@ -103,7 +103,7 @@ File LoggingInfo::getActivityFile() const {
   string activityFileName("activity_history_");
   activityFileName.append(ToString(Clock::now(), _dateFormatStrActivityFiles.data()));
   activityFileName.append(".txt");
-  return File(_dataDir, File::Type::kLog, activityFileName, File::IfError::kThrow);
+  return {_dataDir, File::Type::kLog, activityFileName, File::IfError::kThrow};
 }
 
 void LoggingInfo::createLoggers() {
diff --git a/src/tech/src/codec.cpp b/src/tech/src/codec.cpp
index 941a7292..0e878d19 100644
--- a/src/tech/src/codec.cpp
+++ b/src/tech/src/codec.cpp
@@ -77,14 +77,14 @@ string B64Decode(std::span<const char> ascData) {
 string URLEncode(std::span<const char> ascData) {
   string ret(3U * ascData.size(), '\0');
   char* outCharIt = ret.data();
-  for (char c : ascData) {
-    if (isalnum(c) || c == '-' || c == '.' || c == '_' || c == '~') {
-      *outCharIt++ = c;
+  for (char ch : ascData) {
+    if (isalnum(ch) || ch == '-' || ch == '.' || ch == '_' || ch == '~') {
+      *outCharIt++ = ch;
     } else {
 #ifdef CCT_MSVC
-      sprintf_s(outCharIt, 4, "%%%02X", static_cast<unsigned char>(c));
+      sprintf_s(outCharIt, 4, "%%%02X", static_cast<unsigned char>(ch));
 #else
-      std::sprintf(outCharIt, "%%%02X", static_cast<unsigned char>(c));
+      std::sprintf(outCharIt, "%%%02X", static_cast<unsigned char>(ch));
 #endif
       outCharIt += 3;
     }
diff --git a/src/tech/test/timestring_test.cpp b/src/tech/test/timestring_test.cpp
index 180a34f5..f255502b 100644
--- a/src/tech/test/timestring_test.cpp
+++ b/src/tech/test/timestring_test.cpp
@@ -37,21 +37,21 @@ TEST(TimeStringTest, LiteralDate) {
 }
 
 TEST(TimeStringTest, ToString) {
-  TimePoint p{};
-  p += std::chrono::years(15);
-  p += std::chrono::months(9);
-  p += std::chrono::days(25);
-
-  EXPECT_EQ(ToString(p, "%Y"), "1985");
-  EXPECT_EQ(ToString(p, "%Y-%m"), "1985-10");
-  EXPECT_EQ(ToString(p, "%Y-%m-%d"), "1985-10-26");
-  EXPECT_EQ(ToString(p, "%Y-%m-%d %H"), "1985-10-26 13");
-  EXPECT_EQ(ToString(p, "%Y-%m-%d %H:%M"), "1985-10-26 13:39");
-  EXPECT_EQ(ToString(p, "%Y-%m-%d %H:%M:%S"), "1985-10-26 13:39:54");
-  EXPECT_EQ(ToString(p, "%Y-%m-%d W%U %H:%M:%S"), "1985-10-26 W42 13:39:54");
-
-  EXPECT_EQ(ToString(p, "%D - %T"), "10/26/85 - 13:39:54");
-  EXPECT_EQ(ToString(p, "%D custom string %T"), "10/26/85 custom string 13:39:54");
+  TimePoint tp{};
+  tp += std::chrono::years(15);
+  tp += std::chrono::months(9);
+  tp += std::chrono::days(25);
+
+  EXPECT_EQ(ToString(tp, "%Y"), "1985");
+  EXPECT_EQ(ToString(tp, "%Y-%m"), "1985-10");
+  EXPECT_EQ(ToString(tp, "%Y-%m-%d"), "1985-10-26");
+  EXPECT_EQ(ToString(tp, "%Y-%m-%d %H"), "1985-10-26 13");
+  EXPECT_EQ(ToString(tp, "%Y-%m-%d %H:%M"), "1985-10-26 13:39");
+  EXPECT_EQ(ToString(tp, "%Y-%m-%d %H:%M:%S"), "1985-10-26 13:39:54");
+  EXPECT_EQ(ToString(tp, "%Y-%m-%d W%U %H:%M:%S"), "1985-10-26 W42 13:39:54");
+
+  EXPECT_EQ(ToString(tp, "%D - %T"), "10/26/85 - 13:39:54");
+  EXPECT_EQ(ToString(tp, "%D custom string %T"), "10/26/85 custom string 13:39:54");
 }
 
 TEST(TimeStringTest, FromToString) {