diff --git a/macros/math/log_natural.sql b/macros/math/log_natural.sql
index fea06ff..38a5f4f 100644
--- a/macros/math/log_natural.sql
+++ b/macros/math/log_natural.sql
@@ -25,3 +25,9 @@
     ln({{ x }})
 
 {%- endmacro -%}
+
+{% macro sqlserver__log_natural(x) -%}
+
+    log({{ x }})
+
+{%- endmacro -%}
diff --git a/macros/schema_tests/_generalized/_truth_expression.sql b/macros/schema_tests/_generalized/_truth_expression.sql
index 94be171..de33551 100644
--- a/macros/schema_tests/_generalized/_truth_expression.sql
+++ b/macros/schema_tests/_generalized/_truth_expression.sql
@@ -6,3 +6,7 @@
 {% macro default__truth_expression(expression) %}
   {{ expression }} as expression
 {% endmacro %}
+
+{% macro sqlserver__truth_expression(expression) %}
+  case when {{ expression }} then 1 else 0 end as expression
+{% endmacro %}
diff --git a/macros/schema_tests/_generalized/expression_is_true.sql b/macros/schema_tests/_generalized/expression_is_true.sql
index c21cda8..049b707 100644
--- a/macros/schema_tests/_generalized/expression_is_true.sql
+++ b/macros/schema_tests/_generalized/expression_is_true.sql
@@ -55,4 +55,43 @@ select *
 from validation_errors
 
 
+{% endmacro -%}
+
+{% macro sqlserver__expression_is_true(model, expression, test_condition, group_by_columns, row_condition) -%}
+with grouped_expression as (
+    select
+        {% if group_by_columns %}
+        {% for group_by_column in group_by_columns -%}
+        {{ group_by_column }} as col_{{ loop.index }},
+        {% endfor -%}
+        {% endif %}
+        {{ dbt_expectations.truth_expression(expression) }}
+    from {{ model }}
+     {%- if row_condition %}
+    where
+        {{ row_condition }}
+    {% endif %}
+    {% if group_by_columns %}
+    group by
+    {% for group_by_column in group_by_columns -%}
+        {{ group_by_column }}{% if not loop.last %},{% endif %}
+    {% endfor %}
+    {% endif %}
+
+),
+validation_errors as (
+
+    select
+        *
+    from
+        grouped_expression
+    where
+        not(expression =1)
+
+)
+
+select *
+from validation_errors
+
+
 {% endmacro -%}