diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 59eb90bd27..8753ddee37 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -1700,9 +1700,8 @@ BOOST_AUTO_TEST_CASE(bip341_keypath_test_vectors)
             BOOST_CHECK_EQUAL(HexStr(sighash), input["intermediary"]["sigHash"].get_str());
 
             // To verify the sigmsg, hash the expected sigmsg, and compare it with the (expected) sighash.
-            BOOST_CHECK_EQUAL(HexStr((HashWriter{HASHER_TAPSIGHASH} << Span{ParseHex(input["intermediary"]["sigMsg"].get_str())}).GetSHA256()), input["intermediary"]["sigHash"].get_str());
+            BOOST_CHECK_EQUAL(HexStr((HashWriter{HASHER_TAPSIGHASH} << std::span<const uint8_t>{ParseHex(input["intermediary"]["sigMsg"].get_str())}).GetSHA256()), input["intermediary"]["sigHash"].get_str());
         }
-
     }
 }
 
diff --git a/src/test/serialize_tests.cpp b/src/test/serialize_tests.cpp
index b28e1b4196..7e403694e2 100644
--- a/src/test/serialize_tests.cpp
+++ b/src/test/serialize_tests.cpp
@@ -304,7 +304,7 @@ public:
         if (s.template GetParams<BaseFormat>().m_base_format == BaseFormat::RAW) {
             s << m_base_data;
         } else {
-            s << Span{HexStr(Span{&m_base_data, 1})};
+            s << std::span<const char>{HexStr(Span{&m_base_data, 1})};
         }
     }