diff --git a/src/coverlet.core/Helpers/SourceRootTranslator.cs b/src/coverlet.core/Helpers/SourceRootTranslator.cs
index 4822880..00aab27 100644
--- a/src/coverlet.core/Helpers/SourceRootTranslator.cs
+++ b/src/coverlet.core/Helpers/SourceRootTranslator.cs
@@ -38,7 +38,7 @@ namespace Coverlet.Core.Helpers
             }
             if (!_fileSystem.Exists(moduleTestPath))
             {
-                throw new FileNotFoundException("Module test path not found", moduleTestPath);
+                throw new FileNotFoundException($"Module test path '{moduleTestPath}' not found", moduleTestPath);
             }
             _sourceRootMapping = LoadSourceRootMapping(Path.GetDirectoryName(moduleTestPath));
         }