diff --git a/src/ripple/net/RPCCall.h b/src/ripple/net/RPCCall.h
index a97c6177109..600fad28e58 100644
--- a/src/ripple/net/RPCCall.h
+++ b/src/ripple/net/RPCCall.h
@@ -65,18 +65,22 @@ fromNetwork(
     std::unordered_map<std::string, std::string> headers = {});
 }  // namespace RPCCall
 
-/** Given a rippled command line, return the corresponding JSON.
- */
 Json::Value
-cmdLineToJSONRPC(std::vector<std::string> const& args, beast::Journal j);
+rpcCmdToJson(
+    std::vector<std::string> const& args,
+    Json::Value& retParams,
+    unsigned int apiVersion,
+    beast::Journal j);
 
 /** Internal invocation of RPC client.
+ *  Used by both rippled command line as well as rippled unit tests
  */
 std::pair<int, Json::Value>
 rpcClient(
     std::vector<std::string> const& args,
     Config const& config,
     Logs& logs,
+    unsigned int apiVersion,
     std::unordered_map<std::string, std::string> const& headers = {});
 
 }  // namespace ripple
diff --git a/src/ripple/net/impl/RPCCall.cpp b/src/ripple/net/impl/RPCCall.cpp
index b52545960cc..f4428a3f000 100644
--- a/src/ripple/net/impl/RPCCall.cpp
+++ b/src/ripple/net/impl/RPCCall.cpp
@@ -1472,10 +1472,11 @@ struct RPCCallImp
 //------------------------------------------------------------------------------
 
 // Used internally by rpcClient.
-static Json::Value
-rpcCmdLineToJson(
+Json::Value
+rpcCmdToJson(
     std::vector<std::string> const& args,
     Json::Value& retParams,
+    unsigned int apiVersion,
     beast::Journal j)
 {
     Json::Value jvRequest(Json::objectValue);
@@ -1493,11 +1494,11 @@ rpcCmdLineToJson(
 
     jvRequest = rpParser.parseCommand(args[0], jvRpcParams, true);
 
-    auto insert_api_version = [](Json::Value& jr) {
+    auto insert_api_version = [apiVersion](Json::Value& jr) {
         if (jr.isObject() && !jr.isMember(jss::error) &&
             !jr.isMember(jss::api_version))
         {
-            jr[jss::api_version] = RPC::apiMaximumSupportedVersion;
+            jr[jss::api_version] = apiVersion;
         }
     };
 
@@ -1510,35 +1511,6 @@ rpcCmdLineToJson(
     return jvRequest;
 }
 
-Json::Value
-cmdLineToJSONRPC(std::vector<std::string> const& args, beast::Journal j)
-{
-    Json::Value jv = Json::Value(Json::objectValue);
-    auto const paramsObj = rpcCmdLineToJson(args, jv, j);
-
-    // Re-use jv to return our formatted result.
-    jv.clear();
-
-    // Allow parser to rewrite method.
-    jv[jss::method] = paramsObj.isMember(jss::method)
-        ? paramsObj[jss::method].asString()
-        : args[0];
-
-    // If paramsObj is not empty, put it in a [params] array.
-    if (paramsObj.begin() != paramsObj.end())
-    {
-        auto& paramsArray = Json::setArray(jv, jss::params);
-        paramsArray.append(paramsObj);
-    }
-    if (paramsObj.isMember(jss::jsonrpc))
-        jv[jss::jsonrpc] = paramsObj[jss::jsonrpc];
-    if (paramsObj.isMember(jss::ripplerpc))
-        jv[jss::ripplerpc] = paramsObj[jss::ripplerpc];
-    if (paramsObj.isMember(jss::id))
-        jv[jss::id] = paramsObj[jss::id];
-    return jv;
-}
-
 //------------------------------------------------------------------------------
 
 std::pair<int, Json::Value>
@@ -1546,6 +1518,7 @@ rpcClient(
     std::vector<std::string> const& args,
     Config const& config,
     Logs& logs,
+    unsigned int apiVersion,
     std::unordered_map<std::string, std::string> const& headers)
 {
     static_assert(
@@ -1561,7 +1534,8 @@ rpcClient(
     try
     {
         Json::Value jvRpc = Json::Value(Json::objectValue);
-        jvRequest = rpcCmdLineToJson(args, jvRpc, logs.journal("RPCParser"));
+        jvRequest =
+            rpcCmdToJson(args, jvRpc, apiVersion, logs.journal("RPCParser"));
 
         if (jvRequest.isMember(jss::error))
         {
@@ -1698,7 +1672,8 @@ fromCommandLine(
     const std::vector<std::string>& vCmd,
     Logs& logs)
 {
-    auto const result = rpcClient(vCmd, config, logs);
+    auto const result =
+        rpcClient(vCmd, config, logs, RPC::apiMaximumSupportedVersion);
 
     std::cout << result.second.toStyledString();
 
diff --git a/src/test/jtx/impl/Env.cpp b/src/test/jtx/impl/Env.cpp
index 5e1aaa166f0..3467a42cbbb 100644
--- a/src/test/jtx/impl/Env.cpp
+++ b/src/test/jtx/impl/Env.cpp
@@ -463,7 +463,13 @@ Env::do_rpc(
     std::vector<std::string> const& args,
     std::unordered_map<std::string, std::string> const& headers)
 {
-    return rpcClient(args, app().config(), app().logs(), headers).second;
+    return rpcClient(
+               args,
+               app().config(),
+               app().logs(),
+               RPC::apiMaximumSupportedVersion,
+               headers)
+        .second;
 }
 
 void
diff --git a/src/test/jtx/impl/utility.cpp b/src/test/jtx/impl/utility.cpp
index a2acdd87b4d..196fd9258d7 100644
--- a/src/test/jtx/impl/utility.cpp
+++ b/src/test/jtx/impl/utility.cpp
@@ -18,6 +18,8 @@
 //==============================================================================
 
 #include <ripple/basics/contract.h>
+#include <ripple/json/Object.h>
+#include <ripple/net/RPCCall.h>
 #include <ripple/protocol/ErrorCodes.h>
 #include <ripple/protocol/HashPrefix.h>
 #include <ripple/protocol/Indexes.h>
@@ -73,6 +75,38 @@ fill_seq(Json::Value& jv, ReadView const& view)
     jv[jss::Sequence] = ar->getFieldU32(sfSequence);
 }
 
+Json::Value
+cmdToJSONRPC(
+    std::vector<std::string> const& args,
+    beast::Journal j,
+    unsigned int apiVersion)
+{
+    Json::Value jv = Json::Value(Json::objectValue);
+    auto const paramsObj = rpcCmdToJson(args, jv, apiVersion, j);
+
+    // Re-use jv to return our formatted result.
+    jv.clear();
+
+    // Allow parser to rewrite method.
+    jv[jss::method] = paramsObj.isMember(jss::method)
+        ? paramsObj[jss::method].asString()
+        : args[0];
+
+    // If paramsObj is not empty, put it in a [params] array.
+    if (paramsObj.begin() != paramsObj.end())
+    {
+        auto& paramsArray = Json::setArray(jv, jss::params);
+        paramsArray.append(paramsObj);
+    }
+    if (paramsObj.isMember(jss::jsonrpc))
+        jv[jss::jsonrpc] = paramsObj[jss::jsonrpc];
+    if (paramsObj.isMember(jss::ripplerpc))
+        jv[jss::ripplerpc] = paramsObj[jss::ripplerpc];
+    if (paramsObj.isMember(jss::id))
+        jv[jss::id] = paramsObj[jss::id];
+    return jv;
+}
+
 }  // namespace jtx
 }  // namespace test
 }  // namespace ripple
diff --git a/src/test/jtx/utility.h b/src/test/jtx/utility.h
index cb013a68435..7bc9fbaa817 100644
--- a/src/test/jtx/utility.h
+++ b/src/test/jtx/utility.h
@@ -23,6 +23,7 @@
 #include <ripple/app/ledger/Ledger.h>
 #include <ripple/json/json_value.h>
 #include <ripple/protocol/STObject.h>
+#include <ripple/rpc/impl/RPCHelpers.h>
 #include <stdexcept>
 #include <test/jtx/Account.h>
 
@@ -61,6 +62,13 @@ fill_fee(Json::Value& jv, ReadView const& view);
 void
 fill_seq(Json::Value& jv, ReadView const& view);
 
+/** Given a rippled unit test rpc command, return the corresponding JSON. */
+Json::Value
+cmdToJSONRPC(
+    std::vector<std::string> const& args,
+    beast::Journal j,
+    unsigned int apiVersion = RPC::apiMaximumSupportedVersion);
+
 }  // namespace jtx
 }  // namespace test
 }  // namespace ripple
diff --git a/src/test/rpc/RPCCall_test.cpp b/src/test/rpc/RPCCall_test.cpp
index 5385ba768e6..ce270184a26 100644
--- a/src/test/rpc/RPCCall_test.cpp
+++ b/src/test/rpc/RPCCall_test.cpp
@@ -21,6 +21,7 @@
 #include <ripple/protocol/ErrorCodes.h>
 #include <ripple/rpc/impl/RPCHelpers.h>
 #include <test/jtx.h>
+#include <test/jtx/utility.h>
 
 #include <boost/algorithm/string.hpp>
 #include <initializer_list>
@@ -6442,7 +6443,7 @@ class RPCCall_test : public beast::unit_test::suite
             Json::Value got;
             try
             {
-                got = cmdLineToJSONRPC(args, env.journal);
+                got = jtx::cmdToJSONRPC(args, env.journal);
             }
             catch (std::bad_cast const&)
             {