diff --git a/test/unittests/test_cpp.cpp b/test/unittests/test_cpp.cpp
index 21a5b1ce9..bdf9abbd1 100644
--- a/test/unittests/test_cpp.cpp
+++ b/test/unittests/test_cpp.cpp
@@ -312,8 +312,8 @@ TEST(cpp, host)
     auto* host_context = example_host_create_context();
     auto host = evmc::HostContext{host_context};
 
-    auto a = evmc::address{{1}};
-    auto v = evmc::bytes32{{7, 7, 7}};
+    constexpr auto a = evmc::address{{{1}}};
+    constexpr auto v = evmc::bytes32{{{7, 7, 7}}};
 
     EXPECT_FALSE(host.account_exists(a));