diff --git a/detox/src/ios/earlgreyapi/GREYActions.js b/detox/src/ios/earlgreyapi/GREYActions.js
index 2ea832c6bd..35fe48c80d 100644
--- a/detox/src/ios/earlgreyapi/GREYActions.js
+++ b/detox/src/ios/earlgreyapi/GREYActions.js
@@ -39,6 +39,33 @@ function sanitize_greyContentEdge(action) {
   }
 }
 
+function sanitize_uiAccessibilityTraits(value) {
+  let traits = 0;
+  for (let i = 0; i < value.length; i++) {
+    switch (value[i]) {
+      case 'button': traits |= 1; break;
+      case 'link': traits |= 2; break;
+      case 'header': traits |= 4; break;
+      case 'search': traits |= 8; break;
+      case 'image': traits |= 16; break;
+      case 'selected': traits |= 32; break;
+      case 'plays': traits |= 64; break;
+      case 'key': traits |= 128; break;
+      case 'text': traits |= 256; break;
+      case 'summary': traits |= 512; break;
+      case 'disabled': traits |= 1024; break;
+      case 'frequentUpdates': traits |= 2048; break;
+      case 'startsMedia': traits |= 4096; break;
+      case 'adjustable': traits |= 8192; break;
+      case 'allowsDirectInteraction': traits |= 16384; break;
+      case 'pageTurn': traits |= 32768; break;
+      default: throw new Error(`Unknown trait '${value[i]}', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios`);
+    }
+  }
+
+  return traits;
+}
+
 
 
 class GREYActions {
diff --git a/detox/src/ios/earlgreyapi/GREYMatchers+Detox.js b/detox/src/ios/earlgreyapi/GREYMatchers+Detox.js
index 7ccec743fc..2cb46e1fa6 100644
--- a/detox/src/ios/earlgreyapi/GREYMatchers+Detox.js
+++ b/detox/src/ios/earlgreyapi/GREYMatchers+Detox.js
@@ -39,6 +39,33 @@ function sanitize_greyContentEdge(action) {
   }
 }
 
+function sanitize_uiAccessibilityTraits(value) {
+  let traits = 0;
+  for (let i = 0; i < value.length; i++) {
+    switch (value[i]) {
+      case 'button': traits |= 1; break;
+      case 'link': traits |= 2; break;
+      case 'header': traits |= 4; break;
+      case 'search': traits |= 8; break;
+      case 'image': traits |= 16; break;
+      case 'selected': traits |= 32; break;
+      case 'plays': traits |= 64; break;
+      case 'key': traits |= 128; break;
+      case 'text': traits |= 256; break;
+      case 'summary': traits |= 512; break;
+      case 'disabled': traits |= 1024; break;
+      case 'frequentUpdates': traits |= 2048; break;
+      case 'startsMedia': traits |= 4096; break;
+      case 'adjustable': traits |= 8192; break;
+      case 'allowsDirectInteraction': traits |= 16384; break;
+      case 'pageTurn': traits |= 32768; break;
+      default: throw new Error(`Unknown trait '${value[i]}', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios`);
+    }
+  }
+
+  return traits;
+}
+
 
 
 class GREYMatchers {
diff --git a/detox/src/ios/earlgreyapi/GREYMatchers.js b/detox/src/ios/earlgreyapi/GREYMatchers.js
index 17dbebb7ef..2b8ab723e5 100644
--- a/detox/src/ios/earlgreyapi/GREYMatchers.js
+++ b/detox/src/ios/earlgreyapi/GREYMatchers.js
@@ -39,6 +39,33 @@ function sanitize_greyContentEdge(action) {
   }
 }
 
+function sanitize_uiAccessibilityTraits(value) {
+  let traits = 0;
+  for (let i = 0; i < value.length; i++) {
+    switch (value[i]) {
+      case 'button': traits |= 1; break;
+      case 'link': traits |= 2; break;
+      case 'header': traits |= 4; break;
+      case 'search': traits |= 8; break;
+      case 'image': traits |= 16; break;
+      case 'selected': traits |= 32; break;
+      case 'plays': traits |= 64; break;
+      case 'key': traits |= 128; break;
+      case 'text': traits |= 256; break;
+      case 'summary': traits |= 512; break;
+      case 'disabled': traits |= 1024; break;
+      case 'frequentUpdates': traits |= 2048; break;
+      case 'startsMedia': traits |= 4096; break;
+      case 'adjustable': traits |= 8192; break;
+      case 'allowsDirectInteraction': traits |= 16384; break;
+      case 'pageTurn': traits |= 32768; break;
+      default: throw new Error(`Unknown trait '${value[i]}', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios`);
+    }
+  }
+
+  return traits;
+}
+
 
 
 class GREYMatchers {
@@ -116,6 +143,30 @@ class GREYMatchers {
     };
   }
 
+  /*Matcher for UI element with the provided accessibility @c traits.
+
+@param traits The accessibility traits to be matched.
+
+@return A matcher for the accessibility traits of an accessible element.
+
+*/static matcherForAccessibilityTraits(traits) {
+    if (typeof traits !== 'object' || !traits instanceof Array) {
+      throw new Error('TraitsMatcher ctor argument must be an array, got ' + typeof traits);
+    }
+
+    return {
+      target: {
+        type: "Class",
+        value: "GREYMatchers"
+      },
+      method: "matcherForAccessibilityTraits:",
+      args: [{
+        type: "NSInteger",
+        value: sanitize_uiAccessibilityTraits(traits)
+      }]
+    };
+  }
+
   /*Matcher for UI element with the provided accessiblity @c hint.
 
 @param hint The accessibility hint to be matched.
diff --git a/detox/src/ios/matchers.js b/detox/src/ios/matchers.js
index a0be4da18f..aefc203176 100644
--- a/detox/src/ios/matchers.js
+++ b/detox/src/ios/matchers.js
@@ -59,30 +59,7 @@ class TypeMatcher extends Matcher {
 class TraitsMatcher extends Matcher {
   constructor(value) {
     super();
-    if ((typeof value !== 'object') || (!value instanceof Array)) throw new Error(`TraitsMatcher ctor argument must be an array, got ${typeof value}`);
-    let traits = 0;
-    for (let i = 0; i < value.length; i++) {
-      switch (value[i]) {
-        case 'button': traits |= 1; break;
-        case 'link': traits |= 2; break;
-        case 'header': traits |= 4; break;
-        case 'search': traits |= 8; break;
-        case 'image': traits |= 16; break;
-        case 'selected': traits |= 32; break;
-        case 'plays': traits |= 64; break;
-        case 'key': traits |= 128; break;
-        case 'text': traits |= 256; break;
-        case 'summary': traits |= 512; break;
-        case 'disabled': traits |= 1024; break;
-        case 'frequentUpdates': traits |= 2048; break;
-        case 'startsMedia': traits |= 4096; break;
-        case 'adjustable': traits |= 8192; break;
-        case 'allowsDirectInteraction': traits |= 16384; break;
-        case 'pageTurn': traits |= 32768; break;
-        default: throw new Error(`Unknown trait '${value[i]}', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios`);
-      }
-    }
-    this._call = invoke.call(invoke.IOS.Class('GREYMatchers'), 'matcherForAccessibilityTraits:', invoke.IOS.NSInteger(traits));
+    this._call = invoke.callDirectly(GreyMatchers.matcherForAccessibilityTraits(value));
   }
 }
 
diff --git a/detox/test/e2e/b-matchers.js b/detox/test/e2e/b-matchers.js
index 81aef3fa4d..b169bae3c4 100644
--- a/detox/test/e2e/b-matchers.js
+++ b/detox/test/e2e/b-matchers.js
@@ -57,6 +57,7 @@ describe('Matchers', () => {
     await expect(element(by.id('UniqueId345').and(by.text('ID')))).toExist();
     await expect(element(by.id('UniqueId345').and(by.text('RandomJunk')))).toNotExist();
     await expect(element(by.id('UniqueId345').and(by.label('RandomJunk')))).toNotExist();
+    await expect(element(by.id('UniqueId345').and(by.traits(['button'])))).toNotExist();
   });
 
   // waiting to upgrade EarlGrey version in order to test this (not supported in our current one)
diff --git a/generation/__tests__/__snapshots__/global-functions.js.snap b/generation/__tests__/__snapshots__/global-functions.js.snap
index b34c8b5203..2c8fd64d54 100644
--- a/generation/__tests__/__snapshots__/global-functions.js.snap
+++ b/generation/__tests__/__snapshots__/global-functions.js.snap
@@ -3,3 +3,5 @@
 exports[`globals sanitize_greyContentEdge should fail with unknown value 1`] = `"GREYAction.GREYContentEdge must be a 'left'/'right'/'top'/'bottom', got kittens"`;
 
 exports[`globals sanitize_greyDirection should fail with unknown value 1`] = `"GREYAction.GREYDirection must be a 'left'/'right'/'up'/'down', got kittens"`;
+
+exports[`globals sanitize_uiAccessibilityTraits should throw if unknown trait is accessed 1`] = `"Unknown trait 'unknown', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios"`;
diff --git a/generation/__tests__/global-functions.js b/generation/__tests__/global-functions.js
index 34dd3900d2..71e49527f0 100644
--- a/generation/__tests__/global-functions.js
+++ b/generation/__tests__/global-functions.js
@@ -30,4 +30,15 @@ describe("globals", () => {
       }).toThrowErrorMatchingSnapshot();
     });
   });
+
+  describe("sanitize_uiAccessibilityTraits", () => {
+    it("should return numbers for traits", () => {
+      expect(globals.sanitize_uiAccessibilityTraits(["button", "link"])).toBe(3);
+      expect(globals.sanitize_uiAccessibilityTraits(["summary", "allowsDirectInteraction"])).toBe(16896);
+    });
+
+    it("should throw if unknown trait is accessed", () => {
+      expect(() => globals.sanitize_uiAccessibilityTraits(["unknown"])).toThrowErrorMatchingSnapshot();
+    });
+  });
 });
\ No newline at end of file
diff --git a/generation/earl-grey/global-functions.js b/generation/earl-grey/global-functions.js
index 5720d3ec1f..44f6360013 100644
--- a/generation/earl-grey/global-functions.js
+++ b/generation/earl-grey/global-functions.js
@@ -32,8 +32,36 @@ function sanitize_greyContentEdge(action) {
   }
 }
 
+function sanitize_uiAccessibilityTraits(value) {
+  let traits = 0;
+  for (let i = 0; i < value.length; i++) {
+    switch (value[i]) {
+      case 'button': traits |= 1; break;
+      case 'link': traits |= 2; break;
+      case 'header': traits |= 4; break;
+      case 'search': traits |= 8; break;
+      case 'image': traits |= 16; break;
+      case 'selected': traits |= 32; break;
+      case 'plays': traits |= 64; break;
+      case 'key': traits |= 128; break;
+      case 'text': traits |= 256; break;
+      case 'summary': traits |= 512; break;
+      case 'disabled': traits |= 1024; break;
+      case 'frequentUpdates': traits |= 2048; break;
+      case 'startsMedia': traits |= 4096; break;
+      case 'adjustable': traits |= 8192; break;
+      case 'allowsDirectInteraction': traits |= 16384; break;
+      case 'pageTurn': traits |= 32768; break;
+      default: throw new Error(`Unknown trait '${value[i]}', see list in https://facebook.github.io/react-native/docs/accessibility.html#accessibilitytraits-ios`);
+    }
+  }
+
+  return traits;
+}
+
 
 module.exports = {
   sanitize_greyDirection,
   sanitize_greyContentEdge,
+  sanitize_uiAccessibilityTraits,
 };
\ No newline at end of file
diff --git a/generation/earl-grey/index.js b/generation/earl-grey/index.js
index 0f27be9e96..8c55c71296 100644
--- a/generation/earl-grey/index.js
+++ b/generation/earl-grey/index.js
@@ -32,7 +32,18 @@ const isGreyMatcher = ({ name }) => template(`
   }
 `)({
     ARG: t.identifier(name)
-  })
+  });
+const isArray = ({ name }) => template(`
+if (
+  (typeof ARG !== 'object') || 
+  (!ARG instanceof Array)
+) {
+    throw new Error('TraitsMatcher ctor argument must be an array, got ' + typeof ARG);
+  }
+`)({
+    ARG: t.identifier(name)
+  });
+
 
 // Constants
 const SUPPORTED_TYPES = [
@@ -44,7 +55,8 @@ const SUPPORTED_TYPES = [
   "NSString *",
   "NSString",
   "NSUInteger",
-  "id<GREYMatcher>"
+  "id<GREYMatcher>",
+  "UIAccessibilityTraits"
 ];
 
 /**
@@ -170,6 +182,10 @@ const supportedContentSanitizersMap = {
   GREYContentEdge: {
     type: "NSInteger",
     value: callGlobal("sanitize_greyContentEdge")
+  },
+  UIAccessibilityTraits: {
+    type: "NSInteger",
+    value: callGlobal("sanitize_uiAccessibilityTraits")
   }
 };
 function addArgumentContentSanitizerCall(json) {
@@ -236,6 +252,7 @@ function createTypeCheck(json) {
     GREYContentEdge: isOneOf(["left", "right", "top", "bottom"]),
     GREYPinchDirection: isOneOf(["outward", "inward"]),
     "id<GREYMatcher>": isGreyMatcher,
+    UIAccessibilityTraits: isArray,
   };
 
   const typeCheckCreator = typeInterfaces[json.type];