diff --git a/crates/test-case-core/src/test_case.rs b/crates/test-case-core/src/test_case.rs
index 5ac9ffb..bb543fa 100644
--- a/crates/test-case-core/src/test_case.rs
+++ b/crates/test-case-core/src/test_case.rs
@@ -16,7 +16,9 @@ fn is_test_attribute(attr: &Attribute) -> bool {
         syn::Meta::Path(path) => path,
         _ => return false,
     };
-    let candidates = [
+    const CANDIDATES_LEN: usize = 4;
+
+    let candidates: [[&str; CANDIDATES_LEN]; _] = [
         ["core", "prelude", "*", "test"],
         ["std", "prelude", "*", "test"],
     ];