diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 1bd2d5577d..a1a59fe468 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -1950,8 +1950,13 @@ static UniValue walletpassphrase(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_WALLET_ALREADY_UNLOCKED, "Error: Wallet is already fully unlocked.");
     }
 
-    if (!pwallet->Unlock(strWalletPass, fForMixingOnly))
+    if (strWalletPass.empty()) {
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase can not be empty");
+    }
+
+    if (!pwallet->Unlock(strWalletPass, fForMixingOnly)) {
         throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
+    }
 
     pwallet->TopUpKeyPool();
 
@@ -2011,10 +2016,9 @@ static UniValue walletpassphrasechange(const JSONRPCRequest& request)
     strNewWalletPass.reserve(100);
     strNewWalletPass = request.params[1].get_str().c_str();
 
-    if (strOldWalletPass.length() < 1 || strNewWalletPass.length() < 1)
-        throw std::runtime_error(
-            "walletpassphrasechange <oldpassphrase> <newpassphrase>\n"
-            "Changes the wallet passphrase from <oldpassphrase> to <newpassphrase>.");
+    if (strOldWalletPass.empty() || strNewWalletPass.empty()) {
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase can not be empty");
+    }
 
     if (!pwallet->ChangeWalletPassphrase(strOldWalletPass, strNewWalletPass)) {
         throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
@@ -2109,10 +2113,9 @@ static UniValue encryptwallet(const JSONRPCRequest& request)
     strWalletPass.reserve(100);
     strWalletPass = request.params[0].get_str().c_str();
 
-    if (strWalletPass.length() < 1)
-        throw std::runtime_error(
-            "encryptwallet <passphrase>\n"
-            "Encrypts the wallet with <passphrase>.");
+    if (strWalletPass.empty()) {
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase can not be empty");
+    }
 
     if (!pwallet->EncryptWallet(strWalletPass)) {
         throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: Failed to encrypt the wallet.");
diff --git a/test/functional/wallet_encryption.py b/test/functional/wallet_encryption.py
index a2016574f3..f600438ba7 100755
--- a/test/functional/wallet_encryption.py
+++ b/test/functional/wallet_encryption.py
@@ -31,12 +31,18 @@ class WalletEncryptionTest(BitcoinTestFramework):
         privkey = self.nodes[0].dumpprivkey(address)
         assert_equal(privkey[:1], "c")
         assert_equal(len(privkey), 52)
+        assert_raises_rpc_error(-15, "Error: running with an unencrypted wallet, but walletpassphrase was called", self.nodes[0].walletpassphrase, 'ff', 1)
+        assert_raises_rpc_error(-15, "Error: running with an unencrypted wallet, but walletpassphrasechange was called.", self.nodes[0].walletpassphrasechange, 'ff', 'ff')
 
         # Encrypt the wallet
+        assert_raises_rpc_error(-8, "passphrase can not be empty", self.nodes[0].encryptwallet, '')
         self.nodes[0].encryptwallet(passphrase)
 
         # Test that the wallet is encrypted
         assert_raises_rpc_error(-13, "Please enter the wallet passphrase with walletpassphrase first", self.nodes[0].dumpprivkey, address)
+        assert_raises_rpc_error(-15, "Error: running with an encrypted wallet, but encryptwallet was called.", self.nodes[0].encryptwallet, 'ff')
+        assert_raises_rpc_error(-8, "passphrase can not be empty", self.nodes[0].walletpassphrase, '', 1)
+        assert_raises_rpc_error(-8, "passphrase can not be empty", self.nodes[0].walletpassphrasechange, '', 'ff')
 
         # Check that walletpassphrase works
         self.nodes[0].walletpassphrase(passphrase, 2)