diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index fc2042c8272..49be582606e 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1026,6 +1026,10 @@ module Harness {
                                 } else if (setting.value.toLowerCase() === "commonjs") {
                                     options.module = ts.ModuleKind.CommonJS;
                                     if (options.moduleResolution === undefined) {
+                                        // TODO: currently we have relative module names pretty much in all tests that use CommonJS module target.
+                                        // Such names could never be resolved in Node however classic resolution strategy still can handle them.
+                                        // Changing all module names to relative will be a major overhaul in code (but we'll do this anyway) so  as a temporary measure 
+                                        // we'll use ts.ModuleResolutionKind.Classic for CommonJS modules.
                                         options.moduleResolution = ts.ModuleResolutionKind.Classic;
                                     }
                                 } else if (setting.value.toLowerCase() === "system") {