diff --git a/src/test/rpc_wallet_tests.cpp b/src/test/rpc_wallet_tests.cpp
index 8395d982e..1da7c4781 100644
--- a/src/test/rpc_wallet_tests.cpp
+++ b/src/test/rpc_wallet_tests.cpp
@@ -312,7 +312,9 @@ BOOST_AUTO_TEST_CASE(rpc_wallet_z_exportwallet)
     BOOST_CHECK(addrs.size()==1);
     
     BOOST_CHECK_THROW(CallRPC("z_exportwallet"), runtime_error);
-    
+
+    BOOST_CHECK_THROW(CallRPC("z_exportwallet toomany args"), runtime_error);
+
    
     boost::filesystem::path temp = boost::filesystem::temp_directory_path() /
             boost::filesystem::unique_path();
@@ -362,6 +364,9 @@ BOOST_AUTO_TEST_CASE(rpc_wallet_z_importwallet)
     // error if no args
     BOOST_CHECK_THROW(CallRPC("z_importwallet"), runtime_error);
 
+    // error if too many args
+    BOOST_CHECK_THROW(CallRPC("z_importwallet toomany args"), runtime_error);
+
     // create a random key locally
     auto testSpendingKey = libzcash::SpendingKey::random();
     auto testPaymentAddress = testSpendingKey.address();
@@ -430,6 +435,10 @@ BOOST_AUTO_TEST_CASE(rpc_wallet_z_importexport)
     BOOST_CHECK_THROW(CallRPC("z_importkey"), runtime_error);   
     BOOST_CHECK_THROW(CallRPC("z_exportkey"), runtime_error);   
 
+    // error if too many args
+    BOOST_CHECK_THROW(CallRPC("z_importkey too many args"), runtime_error);
+    BOOST_CHECK_THROW(CallRPC("z_exportkey toomany args"), runtime_error);
+
     // wallet should currently be empty
     std::set<libzcash::PaymentAddress> addrs;
     pwalletMain->GetPaymentAddresses(addrs);
@@ -490,6 +499,9 @@ BOOST_AUTO_TEST_CASE(rpc_wallet_z_importexport)
     CZCPaymentAddress pa(newaddress);
     auto newAddr = pa.Get();
     BOOST_CHECK(pwalletMain->HaveSpendingKey(newAddr));
+
+    // Check if too many args
+    BOOST_CHECK_THROW(CallRPC("z_getnewaddress toomanyargs"), runtime_error);
 }
 
 
@@ -709,6 +721,9 @@ BOOST_AUTO_TEST_CASE(rpc_z_getoperations)
     std::this_thread::sleep_for(std::chrono::milliseconds(1000));
     BOOST_CHECK(q->getOperationCount() == 0);
     
+    // Check if too many args
+    BOOST_CHECK_THROW(CallRPC("z_listoperationids toomany args"), runtime_error);
+
     Value retValue;
     BOOST_CHECK_NO_THROW(retValue = CallRPC("z_listoperationids"));
     BOOST_CHECK(retValue.get_array().size() == 2);
diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
index 61aa4da50..9db1a2fab 100644
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -532,9 +532,9 @@ Value z_importkey(const Array& params, bool fHelp)
     if (!EnsureWalletIsAvailable(fHelp))
         return Value::null;
 
-    if (fHelp || params.size() < 1 || params.size() > 3)
+    if (fHelp || params.size() < 1 || params.size() > 2)
         throw runtime_error(
-            "z_importkey \"zkey\" ( \"label\" rescan )\n"
+            "z_importkey \"zkey\" ( rescan )\n"
             "\nAdds a zkey (as returned by z_exportkey) to your wallet.\n"
             "\nArguments:\n"
             "1. \"zkey\"             (string, required) The zkey (see z_exportkey)\n"
@@ -545,10 +545,8 @@ Value z_importkey(const Array& params, bool fHelp)
             + HelpExampleCli("z_exportkey", "\"myaddress\"") +
             "\nImport the zkey with rescan\n"
             + HelpExampleCli("z_importkey", "\"mykey\"") +
-            "\nImport using a label and without rescan\n"
-            + HelpExampleCli("z_importkey", "\"mykey\" \"testing\" false") +
             "\nAs a JSON-RPC call\n"
-            + HelpExampleRpc("z_importkey", "\"mykey\", \"testing\", false")
+            + HelpExampleRpc("z_importkey", "\"mykey\", false")
         );
 
     LOCK2(cs_main, pwalletMain->cs_wallet);
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 33a62e98d..747682136 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2792,7 +2792,7 @@ Value z_getnewaddress(const Array& params, bool fHelp)
     if (!EnsureWalletIsAvailable(fHelp))
         return Value::null;
 
-    if (fHelp || params.size() > 1)
+    if (fHelp || params.size() > 0)
         throw runtime_error(
             "z_getnewaddress\n"
             "\nReturns a new zaddr for receiving payments.\n"