--- a/browser/components/preferences/tests/browser_contentblocking.js
+++ b/browser/components/preferences/tests/browser_contentblocking.js
@@ -639,20 +639,19 @@ add_task(async function testContentBlock
   let untouchedPrefs = [
     TP_PREF,
     TP_PBM_PREF,
     NCB_PREF,
     NCBP_PREF,
     FP_PREF,
     STP_PREF,
     CM_PREF,
+    REFERRER_PREF,
   ];
 
-  let truePrefs = [REFERRER_PREF];
-
   await openPreferencesViaOpenPreferencesAPI("privacy", { leaveOpen: true });
   let doc = gBrowser.contentDocument;
   let strictRadioOption = doc.getElementById("strictRadio");
   let standardRadioOption = doc.getElementById("standardRadio");
   let customRadioOption = doc.getElementById("customRadio");
   let defaults = new Preferences({ defaultBranch: true });
 
   standardRadioOption.click();
@@ -669,25 +668,16 @@ add_task(async function testContentBlock
   // REFERRER_PREF. All other prefs should remain as they were for standard.
   for (let pref of untouchedPrefs) {
     ok(
       !Services.prefs.prefHasUserValue(pref),
       `the pref ${pref} remains as default value`
     );
   }
 
-  // The custom option will force certain prefs. Checking these prefs to see if
-  // they have been set to the value once custom mode is clicked.
-  for (let pref of truePrefs) {
-    is(
-      Services.prefs.getBoolPref(pref),
-      true,
-      `the pref ${pref} has been set to true in custom`
-    );
-  }
   is(
     Services.prefs.getStringPref(CAT_PREF),
     "custom",
     `${CAT_PREF} has been set to custom`
   );
 
   strictRadioOption.click();
   await TestUtils.waitForCondition(
@@ -775,17 +765,17 @@ add_task(async function testContentBlock
     Services.prefs.prefHasUserValue(NCBP_PREF)
   );
   is(
     Services.prefs.getStringPref(CAT_PREF),
     "custom",
     `${CAT_PREF} has been set to custom`
   );
 
-  for (let pref of [...untouchedPrefs, ...truePrefs]) {
+  for (let pref of untouchedPrefs) {
     SpecialPowers.clearUserPref(pref);
   }
 
   gBrowser.removeCurrentTab();
 });
 
 function checkControlState(doc, controls, enabled) {
   for (let selector of controls) {