diff --git a/src/netbase.cpp b/src/netbase.cpp
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -156,7 +156,7 @@
         return false;
     }
     int port = portDefault;
-    std::string hostname = "";
+    std::string hostname;
     SplitHostPort(std::string(pszName), port, hostname);
 
     std::vector<CNetAddr> vIP;
diff --git a/src/rest.cpp b/src/rest.cpp
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -95,7 +95,7 @@
 }
 
 static std::string AvailableDataFormatsString() {
-    std::string formats = "";
+    std::string formats;
     for (size_t i = 0; i < ARRAYLEN(rf_names); i++) {
         if (strlen(rf_names[i].name) > 0) {
             formats.append(".");
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -168,7 +168,7 @@
     ipv4Addr.s_addr = 0xa0b0c001;
 
     CAddress addr = CAddress(CService(ipv4Addr, 7777), NODE_NETWORK);
-    std::string pszDest = "";
+    std::string pszDest;
     bool fInboundIn = false;
 
     // Test that fFeeler is false by default.
diff --git a/src/utilstrencodings.cpp b/src/utilstrencodings.cpp
--- a/src/utilstrencodings.cpp
+++ b/src/utilstrencodings.cpp
@@ -137,7 +137,7 @@
     static const char *pbase64 =
         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
-    std::string strRet = "";
+    std::string strRet;
     strRet.reserve((len + 2) / 3 * 4);
 
     int mode = 0, left = 0;
@@ -276,7 +276,7 @@
 std::string EncodeBase32(const uint8_t *pch, size_t len) {
     static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
 
-    std::string strRet = "";
+    std::string strRet;
     strRet.reserve((len + 4) / 5 * 8);
 
     int mode = 0, left = 0;
diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -285,7 +285,7 @@
                            "\"myscript\", \"testing\", false"));
     }
 
-    std::string strLabel = "";
+    std::string strLabel;
     if (!request.params[1].isNull()) {
         strLabel = request.params[1].get_str();
     }
@@ -504,7 +504,7 @@
             HelpExampleRpc("importpubkey", "\"mypubkey\", \"testing\", false"));
     }
 
-    std::string strLabel = "";
+    std::string strLabel;
     if (!request.params[1].isNull()) {
         strLabel = request.params[1].get_str();
     }