diff --git a/Tests/ProjectSpecTests/InvalidConfigsFormatTests.swift b/Tests/ProjectSpecTests/InvalidConfigsFormatTests.swift
index 96a7540d..ec3e4e70 100644
--- a/Tests/ProjectSpecTests/InvalidConfigsFormatTests.swift
+++ b/Tests/ProjectSpecTests/InvalidConfigsFormatTests.swift
@@ -36,7 +36,7 @@ struct InvalidConfigsMappingFormatTests {
         #expect {
             try Project(path: arguments.fixturePath)
         } throws: { actualError in
-            (actualError as any CustomStringConvertible).description
+            (actualError as? SpecParsingError)?.description
             == arguments.expectedError.description
         }
     }