diff --git a/src/test/uint256_tests.cpp b/src/test/uint256_tests.cpp
index 8b76e0865a1..ef534b1b78f 100644
--- a/src/test/uint256_tests.cpp
+++ b/src/test/uint256_tests.cpp
@@ -395,15 +395,15 @@ BOOST_AUTO_TEST_CASE(from_hex)
 
 BOOST_AUTO_TEST_CASE(from_user_hex)
 {
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("").value(), uint256::ZERO);
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("0x").value(), uint256::ZERO);
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("0").value(), uint256::ZERO);
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("00").value(), uint256::ZERO);
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("1").value(), uint256::ONE);
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("0x10").value(), uint256{0x10});
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("10").value(), uint256{0x10});
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("0xFf").value(), uint256{0xff});
-    BOOST_CHECK_EQUAL(uint256::FromUserHex("Ff").value(), uint256{0xff});
+    BOOST_CHECK_EQUAL(uint256::FromUserHex(""), uint256::ZERO);
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("0x"), uint256::ZERO);
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("0"), uint256::ZERO);
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("00"), uint256::ZERO);
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("1"), uint256::ONE);
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("0x10"), uint256{0x10});
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("10"), uint256{0x10});
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("0xFf"), uint256{0xff});
+    BOOST_CHECK_EQUAL(uint256::FromUserHex("Ff"), uint256{0xff});
     const std::string valid_hex_64{"0x0123456789abcdef0123456789abcdef0123456789ABDCEF0123456789ABCDEF"};
     BOOST_REQUIRE_EQUAL(valid_hex_64.size(), 2 + 64); // 0x prefix and 64 hex digits
     BOOST_CHECK_EQUAL(uint256::FromUserHex(valid_hex_64.substr(2)).value().ToString(), ToLower(valid_hex_64.substr(2)));
@@ -430,7 +430,7 @@ BOOST_AUTO_TEST_CASE( check_ONE )
 
 BOOST_AUTO_TEST_CASE(FromHex_vs_uint256)
 {
-    auto runtime_uint{uint256::FromHex("4A5E1E4BAAB89F3A32518A88C31BC87F618f76673e2cc77ab2127b7afdeda33b").value()};
+    auto runtime_uint{uint256::FromHex("4A5E1E4BAAB89F3A32518A88C31BC87F618f76673e2cc77ab2127b7afdeda33b")};
     constexpr uint256 consteval_uint{  "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"};
     BOOST_CHECK_EQUAL(consteval_uint, runtime_uint);
 }
diff --git a/src/test/validation_chainstatemanager_tests.cpp b/src/test/validation_chainstatemanager_tests.cpp
index b07c70e1070..b4fcfbd8537 100644
--- a/src/test/validation_chainstatemanager_tests.cpp
+++ b/src/test/validation_chainstatemanager_tests.cpp
@@ -806,22 +806,26 @@ BOOST_FIXTURE_TEST_CASE(chainstatemanager_args, BasicTestingSetup)
     };
 
     // test -assumevalid
-    BOOST_CHECK(!get_valid_opts({}).assumed_valid_block.has_value());
-    BOOST_CHECK(get_valid_opts({"-assumevalid="}).assumed_valid_block.value().IsNull());
-    BOOST_CHECK(get_valid_opts({"-assumevalid=0"}).assumed_valid_block.value().IsNull());
-    BOOST_CHECK(get_valid_opts({"-noassumevalid"}).assumed_valid_block.value().IsNull());
-    BOOST_CHECK_EQUAL(get_valid_opts({"-assumevalid=0x1234"}).assumed_valid_block.value().ToString(), std::string(60, '0') + "1234");
-    const std::string cmd{"-assumevalid=0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"};
-    BOOST_CHECK_EQUAL(get_valid_opts({cmd.c_str()}).assumed_valid_block.value().ToString(), cmd.substr(13, cmd.size()));
+    BOOST_CHECK(!get_valid_opts({}).assumed_valid_block);
+    BOOST_CHECK_EQUAL(get_valid_opts({"-assumevalid="}).assumed_valid_block, uint256::ZERO);
+    BOOST_CHECK_EQUAL(get_valid_opts({"-assumevalid=0"}).assumed_valid_block, uint256::ZERO);
+    BOOST_CHECK_EQUAL(get_valid_opts({"-noassumevalid"}).assumed_valid_block, uint256::ZERO);
+    BOOST_CHECK_EQUAL(get_valid_opts({"-assumevalid=0x12"}).assumed_valid_block, uint256{0x12});
+
+    std::string assume_valid{"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"};
+    BOOST_CHECK_EQUAL(get_valid_opts({("-assumevalid=" + assume_valid).c_str()}).assumed_valid_block, uint256::FromHex(assume_valid));
 
     BOOST_CHECK(!get_opts({"-assumevalid=xyz"}));                                                               // invalid hex characters
     BOOST_CHECK(!get_opts({"-assumevalid=01234567890123456789012345678901234567890123456789012345678901234"})); // > 64 hex chars
 
     // test -minimumchainwork
-    BOOST_CHECK(!get_valid_opts({}).minimum_chain_work.has_value());
-    BOOST_CHECK_EQUAL(get_valid_opts({"-minimumchainwork=0"}).minimum_chain_work.value().GetCompact(), 0U);
-    BOOST_CHECK_EQUAL(get_valid_opts({"-nominimumchainwork"}).minimum_chain_work.value().GetCompact(), 0U);
-    BOOST_CHECK_EQUAL(get_valid_opts({"-minimumchainwork=0x1234"}).minimum_chain_work.value().GetCompact(), 0x02123400U);
+    BOOST_CHECK(!get_valid_opts({}).minimum_chain_work);
+    BOOST_CHECK_EQUAL(get_valid_opts({"-minimumchainwork=0"}).minimum_chain_work, arith_uint256());
+    BOOST_CHECK_EQUAL(get_valid_opts({"-nominimumchainwork"}).minimum_chain_work, arith_uint256());
+    BOOST_CHECK_EQUAL(get_valid_opts({"-minimumchainwork=0x1234"}).minimum_chain_work, arith_uint256{0x1234});
+
+    std::string minimum_chainwork{"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"};
+    BOOST_CHECK_EQUAL(get_valid_opts({("-minimumchainwork=" + minimum_chainwork).c_str()}).minimum_chain_work, UintToArith256(uint256::FromHex(minimum_chainwork).value()));
 
     BOOST_CHECK(!get_opts({"-minimumchainwork=xyz"}));                                                               // invalid hex characters
     BOOST_CHECK(!get_opts({"-minimumchainwork=01234567890123456789012345678901234567890123456789012345678901234"})); // > 64 hex chars