diff --git a/.eslintrc.js b/.eslintrc.js
index 0e8176fe0234..0abe6e88cb9b 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -45,7 +45,6 @@ module.exports = {
   "overrides": [{
       "files": [
         "devtools/**",
-        "ipc/**",
         "js/**",
         "layout/**",
         "media/**",
diff --git a/.prettierignore b/.prettierignore
index 7d75b07d6b47..a2ece3a753bf 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -40,7 +40,6 @@ toolkit/components/telemetry/datareporting-prefs.js
 toolkit/components/telemetry/healthreport-prefs.js
 
 # Ignore all top-level directories for now.
-ipc/**
 js/**
 layout/**
 media/**
diff --git a/ipc/testshell/tests/test_ipcshell.js b/ipc/testshell/tests/test_ipcshell.js
index a965d622468c..3adbe9513e48 100644
--- a/ipc/testshell/tests/test_ipcshell.js
+++ b/ipc/testshell/tests/test_ipcshell.js
@@ -15,15 +15,16 @@ function run_test() {
 
   sendCommand("runtime.processType;", callback);
 
-  [ [ "C", "D" ], [ "D", "C" ], [ "\u010C", "D" ], [ "D", "\u010C" ] ].forEach(
-    function(pair) {
-      do_test_pending();
-      var cmp = pair[0].localeCompare(pair[1]);
-      sendCommand(
-          "'" + pair[0] + "'.localeCompare('" + pair[1] + "');",
-          function(result) {
-              Assert.equal(cmp, result);
-              do_test_finished();
-          });
+  [["C", "D"], ["D", "C"], ["\u010C", "D"], ["D", "\u010C"]].forEach(function(
+    pair
+  ) {
+    do_test_pending();
+    var cmp = pair[0].localeCompare(pair[1]);
+    sendCommand("'" + pair[0] + "'.localeCompare('" + pair[1] + "');", function(
+      result
+    ) {
+      Assert.equal(cmp, result);
+      do_test_finished();
     });
+  });
 }