diff --git a/README.md b/README.md
index 70346771..66a3ac99 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ For compatibility details between versions of dbt-core and dbt-utils, [see this
 
 **[Schema tests](#schema-tests)**
   - [equal_rowcount](#equal_rowcount-source)
+  - [fewer_rows_than](#fewer_rows_than-source)
   - [equality](#equality-source)
   - [expression_is_true](#expression_is_true-source)
   - [recency](#recency-source)
@@ -228,6 +229,8 @@ models:
 #### unique_where ([source](macros/schema_tests/test_unique_where.sql))
 This test validates that there are no duplicate values present in a field for a subset of rows by specifying a `where` clause.
 
+*Warning*: This test is no longer supported. Starting in dbt v0.20.0, the built-in `unique` test supports a `where` config. [See the dbt docs for more details](https://docs.getdbt.com/reference/resource-configs/where).
+
 **Usage:**
 ```yaml
 version: 2
@@ -244,6 +247,8 @@ models:
 #### not_null_where ([source](macros/schema_tests/test_not_null_where.sql))
 This test validates that there are no null values present in a column for a subset of rows by specifying a `where` clause.
 
+*Warning*: This test is no longer supported. Starting in dbt v0.20.0, the built-in `not_null` test supports a `where` config. [See the dbt docs for more details](https://docs.getdbt.com/reference/resource-configs/where).
+
 **Usage:**
 ```yaml
 version: 2
@@ -657,17 +662,25 @@ This macro returns a dictionary from a sql query, so that you don't need to inte
 
 **Usage:**
 ```
--- Returns a dictionary of the users table where the state is California
-{% set california_cities = dbt_utils.get_query_results_as_dict("select * from" ~ ref('cities') ~ "where state = 'CA' and city is not null ") %}
+{% set sql_statement %}
+    select city, state from {{ ref('users) }}
+{% endset %}
+
+{%- set places = dbt_utils.get_query_results_as_dict(sql_statement) -%}
+
 select
-  city,
-{% for city in california_cities %}
-  sum(case when city = {{ city }} then 1 else 0 end) as users_in_{{ city }},
-{% endfor %}
-  count(*) as total
-from {{ ref('users') }}
 
-group by 1
+    {% for city in places['CITY'] | unique -%}
+      sum(case when city = '{{ city }}' then 1 else 0 end) as users_in_{{ dbt_utils.slugify(city) }},
+    {% endfor %}
+
+    {% for state in places['STATE'] | unique -%}
+      sum(case when state = '{{ state }}' then 1 else 0 end) as users_in_{{ state }},
+    {% endfor %}
+
+    count(*) as total_total
+
+from {{ ref('users') }}
 ```
 
 ### SQL generators
@@ -1042,7 +1055,7 @@ select
 order_id,
 {%- for payment_method in payment_methods %}
 sum(case when payment_method = '{{ payment_method }}' then amount end)
-  as {{ slugify(payment_method) }}_amount,
+  as {{ dbt_utils.slugify(payment_method) }}_amount,
 
 {% endfor %}
 ...
diff --git a/macros/materializations/insert_by_period_materialization.sql b/macros/materializations/insert_by_period_materialization.sql
index 851afa3d..5a15c815 100644
--- a/macros/materializations/insert_by_period_materialization.sql
+++ b/macros/materializations/insert_by_period_materialization.sql
@@ -53,7 +53,7 @@
 {% materialization insert_by_period, default -%}
   {%- set timestamp_field = config.require('timestamp_field') -%}
   {%- set start_date = config.require('start_date') -%}
-  {%- set stop_date = config.get('stop_date') or '' -%}}
+  {%- set stop_date = config.get('stop_date') or '' -%}
   {%- set period = config.get('period') or 'week' -%}
 
   {%- if sql.find('__PERIOD_FILTER__') == -1 -%}