diff --git a/.eslintrc b/.eslintrc
index 19745e120..fd436e3b9 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -8,7 +8,7 @@ env:
 parserOptions:
   parser: babel-eslint
   sourceType: module
-  ecmaVersion: 6
+  ecmaVersion: 2017
   ecmaFeatures:
     experimentalObjectRestSpread: true
 
@@ -44,10 +44,3 @@ rules:
   require-path-exists/notEmpty: 2
   semi: [2, always]
   space-before-function-paren: [2, always]
-
-  no-restricted-syntax:
-    - error
-    - default-params
-    - generators
-    - rest-params
-    - spread
diff --git a/src/.eslintrc b/src/.eslintrc
index c91f75d1f..b05e87b27 100644
--- a/src/.eslintrc
+++ b/src/.eslintrc
@@ -4,10 +4,15 @@ env:
   browser: true
   node: false
 
-parserOptions:
-  ecmaFeatures:
-    experimentalObjectRestSpread: false
-
 rules:
   no-console: 2
   strict: [2, never]
+
+  no-restricted-syntax:
+    - error
+    - selector: :matches(ArrowFunctionExpression,FunctionExpression,FunctionDeclaration) > AssignmentPattern
+      message: Using default parameters is not allowed.
+    - Generator
+    - RestElement
+    - ExperimentalRestProperty
+    - ExperimentalSpreadProperty
diff --git a/src/Interaction.js b/src/Interaction.js
index 99da9a37e..d12851135 100644
--- a/src/Interaction.js
+++ b/src/Interaction.js
@@ -304,7 +304,7 @@ class Interaction {
     return this.pointers[this.getPointerIndex(pointer)];
   }
 
-  updatePointer (pointer, event, eventTarget, down = event && /(down|start)$/i.test(event.type)) {
+  updatePointer (pointer, event, eventTarget, down) {
     const id = utils.pointer.getPointerId(pointer);
     let pointerIndex = this.getPointerIndex(pointer);
     let pointerInfo = this.pointers[pointerIndex];
diff --git a/tests/pointerEvents/base.js b/tests/pointerEvents/base.js
index e5b01ebe0..891cef669 100644
--- a/tests/pointerEvents/base.js
+++ b/tests/pointerEvents/base.js
@@ -125,12 +125,12 @@ test('pointerEvents Interaction update-pointer-down signal', t => {
 
   const interaction = scope.interactions.new({});
   const initialTimer = { duration: Infinity, timeout: null };
-  const event = { type: 'down' };
+  const event = {};
 
-  interaction.updatePointer(helpers.newPointer(0), event);
+  interaction.updatePointer(helpers.newPointer(0), event, null, true);
   t.deepEqual(interaction.holdTimers, [initialTimer]);
 
-  interaction.updatePointer(helpers.newPointer(5), event);
+  interaction.updatePointer(helpers.newPointer(5), event, null, true);
   t.deepEqual(interaction.holdTimers, [initialTimer, initialTimer]);
 
   t.end();