diff --git a/src/ol/expression/lexer.js b/src/ol/expression/lexer.js
index cf2ddd42b2..9dbbb2afc3 100644
--- a/src/ol/expression/lexer.js
+++ b/src/ol/expression/lexer.js
@@ -1,4 +1,5 @@
 goog.provide('ol.expression.Lexer');
+goog.provide('ol.expression.TokenType');
 
 goog.require('goog.asserts');
 
diff --git a/test/spec/ol/expression/lexer.test.js b/test/spec/ol/expression/lexer.test.js
index 42d4bc3867..89f37614d5 100644
--- a/test/spec/ol/expression/lexer.test.js
+++ b/test/spec/ol/expression/lexer.test.js
@@ -19,36 +19,43 @@ describe('ol.expression.Lexer', function() {
     it('works for integers', function() {
       var token = scan('123');
       expect(token.value).to.be(123);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works for float', function() {
       var token = scan('123.456');
       expect(token.value).to.be(123.456);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works with exponent', function() {
       var token = scan('1.234e5');
       expect(token.value).to.be(1.234e5);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works with explicit positive exponent', function() {
       var token = scan('1.234e+5');
       expect(token.value).to.be(1.234e5);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works with negative exponent', function() {
       var token = scan('1.234e-5');
       expect(token.value).to.be(1.234e-5);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works with octals', function() {
       var token = scan('02322');
       expect(token.value).to.be(1234);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
     it('works with hex', function() {
       var token = scan('0x4d2');
       expect(token.value).to.be(1234);
+      expect(token.type).to.be(ol.expression.TokenType.NUMERIC_LITERAL);
     });
 
   });
@@ -56,3 +63,4 @@ describe('ol.expression.Lexer', function() {
 });
 
 goog.require('ol.expression.Lexer');
+goog.require('ol.expression.TokenType');