diff --git a/src/AbstractDmlQuery.php b/src/AbstractDmlQuery.php
index 3edb7a4..b7c5702 100644
--- a/src/AbstractDmlQuery.php
+++ b/src/AbstractDmlQuery.php
@@ -45,7 +45,7 @@ abstract class AbstractDmlQuery extends AbstractQuery
      */
     public function hasCols()
     {
-        return (bool) $this->col_values;
+        return !empty($this->col_values);
     }
 
     /**
diff --git a/tests/AbstractQueryTest.php b/tests/AbstractQueryTest.php
index a7eee4c..14d9b87 100644
--- a/tests/AbstractQueryTest.php
+++ b/tests/AbstractQueryTest.php
@@ -73,5 +73,8 @@ public function testBindValues()
         $expect = array('foo' => 'bar', 'baz' => 'dib', 'zim' => 'gir');
         $actual = $this->query->getBindValues();
         $this->assertSame($expect, $actual);
+
+        $this->query->resetBindValues();
+        $this->assertEmpty($this->query->getBindValues());
     }
 }
diff --git a/tests/Common/SelectTest.php b/tests/Common/SelectTest.php
index 02e76d7..ba6790c 100644
--- a/tests/Common/SelectTest.php
+++ b/tests/Common/SelectTest.php
@@ -960,4 +960,28 @@ public function testUnionSelectCanHaveSameAliasesInDifferentSelects()
         $actual = (string) $select->getStatement();
         $this->assertSameSql($expected, $actual);
     }
+
+    public function testResetUnion()
+    {
+        $select = $this->query
+            ->cols(array(
+                '...'
+            ))
+            ->from('a')
+            ->union()
+            ->cols(array(
+                '...'
+            ))
+            ->from('b');
+
+        // should remove all prior queries and just leave the last.
+        $select->resetUnions();
+        $expected = 'SELECT
+                    ...
+                    FROM
+                    <<b>>';
+
+        $actual = (string) $select->getStatement();
+        $this->assertSameSql($expected, $actual);
+    }
 }
diff --git a/tests/Common/UpdateTest.php b/tests/Common/UpdateTest.php
index de4996d..9b40919 100644
--- a/tests/Common/UpdateTest.php
+++ b/tests/Common/UpdateTest.php
@@ -42,4 +42,12 @@ public function testCommon()
         );
         $this->assertSame($expect, $actual);
     }
+
+    public function testHasCols()
+    {
+        $this->query->table('t1');
+        $this->assertFalse($this->query->hasCols());
+        $this->query->cols(['c1', 'c2']);
+        $this->assertTrue($this->query->hasCols());
+    }
 }
diff --git a/tests/FakeQuery.php b/tests/FakeQuery.php
deleted file mode 100644
index cc179cc..0000000
--- a/tests/FakeQuery.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-namespace Aura\SqlQuery;
-
-class FakeQuery extends AbstractQuery
-{
-    public function build()
-    {
-        return 'Hello Query!';
-    }
-
-    public function quoteName($text)
-    {
-        return parent::quoteName($text);
-    }
-
-    public function quoteNamesIn($text)
-    {
-        return parent::quoteNamesIn($text);
-    }
-}