diff --git a/test/datetime_test.rb b/test/datetime_test.rb
index ed23e5a..30945e3 100644
--- a/test/datetime_test.rb
+++ b/test/datetime_test.rb
@@ -66,41 +66,153 @@ def test_less_equals
     refute_includes Product.search("created_at <= 2014-05-01"), product
   end
 
-  def test_hours_ago
+  def test_hours_ago_less
+    product = create(:product, created_at: 5.hours.ago)
+
+    assert_includes Product.search("created_at < '4 hours ago'"), product
+    refute_includes Product.search("created_at < '6 hours ago'"), product
+  end
+
+  def test_hours_ago_less
+    product = create(:product, created_at: 5.hours.ago)
+
+    assert_includes Product.search("created_at < '4 hours ago'"), product
+    refute_includes Product.search("created_at < '6 hours ago'"), product
+  end
+
+  def test_hours_ago_less_equals
     product = create(:product, created_at: 5.hours.ago)
 
     assert_includes Product.search("created_at <= '4 hours ago'"), product
     refute_includes Product.search("created_at <= '6 hours ago'"), product
   end
 
-  def test_days_ago
+  def test_hours_ago_greater
+    product = create(:product, created_at: 5.hours.ago)
+
+    refute_includes Product.search("created_at > '4 hours ago'"), product
+    assert_includes Product.search("created_at > '6 hours ago'"), product
+  end
+
+  def test_hours_ago_greater_equals
+    product = create(:product, created_at: 5.hours.ago)
+
+    refute_includes Product.search("created_at >= '4 hours ago'"), product
+    assert_includes Product.search("created_at >= '6 hours ago'"), product
+  end
+
+  def test_days_ago_less
+    product = create(:product, created_at: 2.days.ago)
+
+    assert_includes Product.search("created_at < '1 day ago'"), product
+    refute_includes Product.search("created_at < '3 days ago'"), product
+  end
+
+  def test_days_ago_less_equals
     product = create(:product, created_at: 2.days.ago)
 
     assert_includes Product.search("created_at <= '1 day ago'"), product
     refute_includes Product.search("created_at <= '3 days ago'"), product
   end
 
-  def test_weeks_ago
+  def test_days_ago_greater
+    product = create(:product, created_at: 2.days.ago)
+
+    refute_includes Product.search("created_at > '1 day ago'"), product
+    assert_includes Product.search("created_at > '3 days ago'"), product
+  end
+
+  def test_days_ago_greater_equals
+    product = create(:product, created_at: 2.days.ago)
+
+    refute_includes Product.search("created_at >= '1 day ago'"), product
+    assert_includes Product.search("created_at >= '3 days ago'"), product
+  end
+
+  def test_weeks_ago_less
+    product = create(:product, created_at: 2.weeks.ago)
+
+    assert_includes Product.search("created_at < '1 weeks ago'"), product
+    refute_includes Product.search("created_at < '3 weeks ago'"), product
+  end
+
+  def test_weeks_ago_less_equals
     product = create(:product, created_at: 2.weeks.ago)
 
     assert_includes Product.search("created_at <= '1 weeks ago'"), product
     refute_includes Product.search("created_at <= '3 weeks ago'"), product
   end
 
-  def test_months_ago
+  def test_weeks_ago_greater
+    product = create(:product, created_at: 2.weeks.ago)
+
+    refute_includes Product.search("created_at > '1 weeks ago'"), product
+    assert_includes Product.search("created_at > '3 weeks ago'"), product
+  end
+
+  def test_weeks_ago_greater_equals
+    product = create(:product, created_at: 2.weeks.ago)
+
+    refute_includes Product.search("created_at >= '1 weeks ago'"), product
+    assert_includes Product.search("created_at >= '3 weeks ago'"), product
+  end
+
+  def test_months_ago_less
+    product = create(:product, created_at: 2.months.ago)
+
+    assert_includes Product.search("created_at < '1 months ago'"), product
+    refute_includes Product.search("created_at < '3 months ago'"), product
+  end
+
+  def test_months_ago_less_equals
     product = create(:product, created_at: 2.months.ago)
 
     assert_includes Product.search("created_at <= '1 months ago'"), product
     refute_includes Product.search("created_at <= '3 months ago'"), product
   end
 
-  def test_years_ago
+  def test_months_ago_greater
+    product = create(:product, created_at: 2.months.ago)
+
+    refute_includes Product.search("created_at > '1 months ago'"), product
+    assert_includes Product.search("created_at > '3 months ago'"), product
+  end
+
+  def test_months_ago_greater_equals
+    product = create(:product, created_at: 2.months.ago)
+
+    refute_includes Product.search("created_at >= '1 months ago'"), product
+    assert_includes Product.search("created_at >= '3 months ago'"), product
+  end
+
+  def test_years_ago_less
+    product = create(:product, created_at: 2.years.ago)
+
+    assert_includes Product.search("created_at < '1 years ago'"), product
+    refute_includes Product.search("created_at < '3 years ago'"), product
+  end
+
+  def test_years_ago_less_equals
     product = create(:product, created_at: 2.years.ago)
 
     assert_includes Product.search("created_at <= '1 years ago'"), product
     refute_includes Product.search("created_at <= '3 years ago'"), product
   end
 
+  def test_years_ago_greater
+    product = create(:product, created_at: 2.years.ago)
+
+    refute_includes Product.search("created_at > '1 years ago'"), product
+    assert_includes Product.search("created_at > '3 years ago'"), product
+  end
+
+  def test_years_ago_greater_equals
+    product = create(:product, created_at: 2.years.ago)
+
+    refute_includes Product.search("created_at >= '1 years ago'"), product
+    assert_includes Product.search("created_at >= '3 years ago'"), product
+  end
+
   if DATABASE == "postgres" && ActiveRecord::VERSION::MAJOR >= 7
     def test_timestamp_with_zone
       product = create(:product, timestamp_with_zone: Time.parse("2014-05-01 12:30:30 CEST"))