diff --git a/lib/project_config/project_config.spec.ts b/lib/project_config/project_config.spec.ts
index 54aa75d97..11bb36767 100644
--- a/lib/project_config/project_config.spec.ts
+++ b/lib/project_config/project_config.spec.ts
@@ -249,11 +249,11 @@ describe('createProjectConfig - cmab experiments', () => {
   it('should populate cmab field correctly', function() {
     const datafile = testDatafile.getTestProjectConfig();
     datafile.experiments[0].cmab = {
-      attributes: ['808797688', '808797689'],
+      attributeIds: ['808797688', '808797689'],
     };
 
     datafile.experiments[2].cmab = {
-      attributes: ['808797689'],
+      attributeIds: ['808797689'],
     };
 
     const configObj = projectConfig.createProjectConfig(datafile);
diff --git a/lib/project_config/project_config.ts b/lib/project_config/project_config.ts
index 5a7674668..65249c09d 100644
--- a/lib/project_config/project_config.ts
+++ b/lib/project_config/project_config.ts
@@ -157,15 +157,6 @@ export const createProjectConfig = function(datafileObj?: JSON, datafileStr: str
 
   projectConfig.__datafileStr = datafileStr === null ? JSON.stringify(datafileObj) : datafileStr;
 
-  /** rename cmab.attributes field from the datafile to cmab.attributeIds for each experiment */
-  projectConfig.experiments.forEach(experiment => {
-    if (experiment.cmab) {
-      const attributes = (experiment.cmab as any).attributes;
-      delete (experiment.cmab as any).attributes;
-      experiment.cmab.attributeIds = attributes;
-    }
-  });
-
   /*
    * Conditions of audiences in projectConfig.typedAudiences are not
    * expected to be string-encoded as they are here in projectConfig.audiences.