diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -6,3 +6,7 @@
 
 This release includes the following features and fixes:
  - Add an extra 64 bits of entropy in the initial version message.
+ - The `setexcessiveblock` RPC is deprecated and will be removed in a future
+   version. The `-excessiveblocksize` option should be used instead. Use the
+   `-deprecatedrpc=setexcessiveblock` option to continue using the
+   `setexcessiveblock` RPC.
diff --git a/src/rpc/abc.cpp b/src/rpc/abc.cpp
--- a/src/rpc/abc.cpp
+++ b/src/rpc/abc.cpp
@@ -34,9 +34,9 @@
                                   const JSONRPCRequest &request) {
     RPCHelpMan{
         "setexcessiveblock",
-        "Set the excessive block size. Excessive blocks will not be used in "
-        "the active chain or relayed. This discourages the propagation of "
-        "blocks that you consider excessively large.",
+        "DEPRECATED. Set the excessive block size. Excessive blocks will not "
+        "be used in the active chain or relayed. This discourages the "
+        "propagation of blocks that you consider excessively large.",
         {
             {"blockSize", RPCArg::Type::NUM, RPCArg::Optional::NO,
              "Excessive block size in bytes.  Must be greater than " +
@@ -48,6 +48,16 @@
     }
         .Check(request);
 
+    if (!IsDeprecatedRPCEnabled(gArgs, "setexcessiveblock")) {
+        // setexcessiveblock is deprecated in v0.22.12 for removal in v0.23
+        throw JSONRPCError(
+            RPC_METHOD_DEPRECATED,
+            std::string(
+                "The setexcessiveblock RPC is deprecated and will be removed "
+                "in a future version. Use the -deprecatedrpc=setexcessiveblock "
+                "option to continue using it."));
+    }
+
     if (!request.params[0].isNum()) {
         throw JSONRPCError(
             RPC_INVALID_PARAMETER,
diff --git a/src/test/excessiveblock_tests.cpp b/src/test/excessiveblock_tests.cpp
--- a/src/test/excessiveblock_tests.cpp
+++ b/src/test/excessiveblock_tests.cpp
@@ -19,6 +19,10 @@
 
 class ExcessiveBlockTestingSetup : public TestingSetup {
 public:
+    ExcessiveBlockTestingSetup()
+        : TestingSetup(CBaseChainParams::MAIN,
+                       {"-deprecatedrpc=setexcessiveblock"}){};
+
     UniValue CallRPC(const std::string &args) {
         const util::Ref context{m_node};
         return ::CallRPC(args, context);
diff --git a/test/functional/abc_rpc_excessiveblock.py b/test/functional/abc_rpc_excessiveblock.py
--- a/test/functional/abc_rpc_excessiveblock.py
+++ b/test/functional/abc_rpc_excessiveblock.py
@@ -25,6 +25,7 @@
         self.num_nodes = 1
         self.tip = None
         self.setup_clean_chain = True
+        self.extra_args = [["-deprecatedrpc=setexcessiveblock"]]
 
     def check_subversion(self, pattern_str):
         # Check that the subversion is set as expected
@@ -84,7 +85,6 @@
         self.check_subversion(r"/Bitcoin ABC:.*\(EB13\.1; .*\)/")
 
     def run_test(self):
-        self.genesis_hash = int(self.nodes[0].getbestblockhash(), 16)
         self.test_excessiveblock()
 
 
diff --git a/test/functional/rpc_deprecated.py b/test/functional/rpc_deprecated.py
--- a/test/functional/rpc_deprecated.py
+++ b/test/functional/rpc_deprecated.py
@@ -3,14 +3,17 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test deprecation of RPC calls."""
+from test_framework.cdefs import DEFAULT_MAX_BLOCK_SIZE
 from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_raises_rpc_error
 
 
 class DeprecatedRpcTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 2
         self.setup_clean_chain = True
-        self.extra_args = [[], ["-deprecatedrpc=banscore"]]
+        self.extra_args = [[], ["-deprecatedrpc=banscore",
+                                "-deprecatedrpc=setexcessiveblock"]]
 
     def run_test(self):
         # This test should be used to verify correct behaviour of deprecated
@@ -28,6 +31,13 @@
         assert 'banscore' not in self.nodes[0].getpeerinfo()[0]
         assert 'banscore' in self.nodes[1].getpeerinfo()[0]
 
+        self.log.info("Test deprecated setexcessiveblock RPC")
+        assert_raises_rpc_error(-32,
+                                'The setexcessiveblock RPC is deprecated',
+                                self.nodes[0].setexcessiveblock,
+                                DEFAULT_MAX_BLOCK_SIZE)
+        self.nodes[1].setexcessiveblock(DEFAULT_MAX_BLOCK_SIZE)
+
 
 if __name__ == '__main__':
     DeprecatedRpcTest().main()