diff --git a/spec/generated-parser.spec.js b/spec/generated-parser.spec.js
index c8a7158..43fa0f3 100644
--- a/spec/generated-parser.spec.js
+++ b/spec/generated-parser.spec.js
@@ -91,6 +91,23 @@ describe("generated parser", function() {
     });
   });
 
+  describe("simple not matching", function() {
+    varyAll(function(options) {
+      it("matches correctly", function() {
+        var parser = PEG.buildParser('start = !"a" "b"', options);
+
+        expect(parser).toParse("b", ["", "b"]);
+        expect(parser).toFailToParse("a");
+      });
+
+      it("does not advance position on failure", function() {
+        var parser = PEG.buildParser('start = !"a" / "a"', options);
+
+        expect(parser).toParse("a", "a");
+      });
+    });
+  });
+
   describe("semantic and code", function() {
     varyAll(function(options) {
       it("causes successful match by returning |true|", function() {
diff --git a/test/compiler-test.js b/test/compiler-test.js
index 48f2df9..c1e1d76 100644
--- a/test/compiler-test.js
+++ b/test/compiler-test.js
@@ -60,19 +60,6 @@ testWithVaryingTrackLineAndColumn("simple and", function(options) {
    */
 });
 
-testWithVaryingTrackLineAndColumn("simple not", function(options) {
-  var parser = PEG.buildParser('start = "a" !"b"', options);
-  parses(parser, "a", ["a", ""]);
-  doesNotParse(parser, "ab");
-
-  /*
-   * Test that the parsing position returns after successful parsing of a
-   * predicate.
-   */
-  var posTestParser = PEG.buildParser('start = "a" !"b" "c"');
-  parses(posTestParser, "ac", ["a", "", "c"]);
-});
-
 testWithVaryingTrackLineAndColumn("initializer", function(options) {
   var variableInActionParser = PEG.buildParser(
     '{ a = 42; }; start = "a" { return a; }',