diff --git a/src/spectator/dsl/groups.cr b/src/spectator/dsl/groups.cr
index d0aa425..7b3b851 100644
--- a/src/spectator/dsl/groups.cr
+++ b/src/spectator/dsl/groups.cr
@@ -2,19 +2,22 @@ require "../spec_builder"
 
 module Spectator
   module DSL
-    macro context(what, &block)
+    macro context(what, _source_file = __FILE__, _source_line = __LINE__, &block)
       class Context%context < {{@type.id}}
-        ::Spectator::SpecBuilder.start_group(
-          {% if what.is_a?(StringLiteral) %}
-            {% if what.starts_with?("#") || what.starts_with?(".") %}
-              {{what.id.symbolize}}
-            {% else %}
-              {{what}}
-            {% end %}
-          {% else %}
-            {{what.symbolize}}
-          {% end %}
-        )
+        {%
+          description = if what.is_a?(StringLiteral)
+                          if what.starts_with?("#") || what.starts_with?(".")
+                            what.id.symbolize
+                          else
+                            what
+                          end
+                        else
+                          what.symbolize
+                        end
+        %}
+
+        %source = ::Spectator::Source.new({{_source_file}}, {{_source_line}})
+        ::Spectator::SpecBuilder.start_group({{description}}, %source)
 
         {% if what.is_a?(Path) || what.is_a?(Generic) %}
           macro described_class
@@ -36,7 +39,7 @@ module Spectator
       context({{what}}) {{block}}
     end
 
-    macro sample(collection, count = nil, &block)
+    macro sample(collection, count = nil, _source_file = __FILE__, _source_line = __LINE__, &block)
       {% name = block.args.empty? ? :value.id : block.args.first.id %}
 
       def %collection
@@ -52,7 +55,8 @@ module Spectator
       end
 
       class Context%sample < {{@type.id}}
-        ::Spectator::SpecBuilder.start_sample_group({{collection.stringify}}, :%sample, {{name.stringify}}) do |values|
+        %source = ::Spectator::Source.new({{_source_file}}, {{_source_line}})
+        ::Spectator::SpecBuilder.start_sample_group({{collection.stringify}}, %source, :%sample, {{name.stringify}}) do |values|
           sample = {{@type.id}}.new(values)
           sample.%to_a
         end
@@ -67,7 +71,7 @@ module Spectator
       end
     end
 
-    macro random_sample(collection, count = nil, &block)
+    macro random_sample(collection, count = nil, _source_file = __FILE__, _source_line = __LINE__, &block)
       {% name = block.args.empty? ? :value.id : block.args.first.id %}
 
       def %collection
@@ -83,7 +87,8 @@ module Spectator
       end
 
       class Context%sample < {{@type.id}}
-        ::Spectator::SpecBuilder.start_sample_group({{collection.stringify}}, :%sample, {{name.stringify}}) do |values|
+        %source = ::Spectator::Source.new({{_source_file}}, {{_source_line}})
+        ::Spectator::SpecBuilder.start_sample_group({{collection.stringify}}, %source, :%sample, {{name.stringify}}) do |values|
           sample = {{@type.id}}.new(values)
           collection = sample.%to_a
           {% if count %}
diff --git a/src/spectator/example_component.cr b/src/spectator/example_component.cr
index d2b651e..4311f54 100644
--- a/src/spectator/example_component.cr
+++ b/src/spectator/example_component.cr
@@ -6,6 +6,8 @@ module Spectator
     # TODO: Rename to description.
     abstract def what : Symbol | String
 
+    abstract def source : Source
+
     # Indicates whether the example (or group) has been completely run.
     abstract def finished? : Bool
 
diff --git a/src/spectator/nested_example_group.cr b/src/spectator/nested_example_group.cr
index c529696..fb1902c 100644
--- a/src/spectator/nested_example_group.cr
+++ b/src/spectator/nested_example_group.cr
@@ -8,6 +8,8 @@ module Spectator
     # This is a symbol when referencing a type.
     getter what : Symbol | String
 
+    getter source : Source
+
     # Group that this is nested in.
     getter parent : ExampleGroup
 
@@ -18,7 +20,7 @@ module Spectator
     # The parent's children must contain this group,
     # otherwise there may be unexpected behavior.
     # The *hooks* are stored to be triggered later.
-    def initialize(@what, @parent, context)
+    def initialize(@what, @source, @parent, context)
       super(context)
     end
 
diff --git a/src/spectator/root_example_group.cr b/src/spectator/root_example_group.cr
index 65836c3..ee787c0 100644
--- a/src/spectator/root_example_group.cr
+++ b/src/spectator/root_example_group.cr
@@ -9,6 +9,10 @@ module Spectator
       "ROOT"
     end
 
+    def source : Source
+      Source.new(__FILE__, __LINE__)
+    end
+
     # Indicates that the group is symbolic.
     def symbolic? : Bool
       true
diff --git a/src/spectator/spec_builder/nested_example_group_builder.cr b/src/spectator/spec_builder/nested_example_group_builder.cr
index 0c2bf1e..7525858 100644
--- a/src/spectator/spec_builder/nested_example_group_builder.cr
+++ b/src/spectator/spec_builder/nested_example_group_builder.cr
@@ -3,12 +3,12 @@ require "./example_group_builder"
 
 module Spectator::SpecBuilder
   class NestedExampleGroupBuilder < ExampleGroupBuilder
-    def initialize(@what : String | Symbol)
+    def initialize(@what : String | Symbol, @source : Source)
     end
 
     def build(parent_group)
       context = TestContext.new(parent_group.context, build_hooks, parent_group.context.values)
-      NestedExampleGroup.new(@what, parent_group, context).tap do |group|
+      NestedExampleGroup.new(@what, @source, parent_group, context).tap do |group|
         group.children = children.map do |child|
           child.build(group).as(ExampleComponent)
         end
diff --git a/src/spectator/spec_builder/sample_example_group_builder.cr b/src/spectator/spec_builder/sample_example_group_builder.cr
index ae2909e..a2c6ce3 100644
--- a/src/spectator/spec_builder/sample_example_group_builder.cr
+++ b/src/spectator/spec_builder/sample_example_group_builder.cr
@@ -2,15 +2,15 @@ require "./nested_example_group_builder"
 
 module Spectator::SpecBuilder
   class SampleExampleGroupBuilder(T) < NestedExampleGroupBuilder
-    def initialize(what : String | Symbol, @id : Symbol, @label : String, @collection_builder : TestValues -> Array(T))
-      super(what)
+    def initialize(what : String | Symbol, source : Source, @id : Symbol, @label : String, @collection_builder : TestValues -> Array(T))
+      super(what, source)
     end
 
     def build(parent_group)
       values = parent_group.context.values
       collection = @collection_builder.call(values)
       context = TestContext.new(parent_group.context, build_hooks, values)
-      NestedExampleGroup.new(@what, parent_group, context).tap do |group|
+      NestedExampleGroup.new(@what, @source, parent_group, context).tap do |group|
         group.children = collection.map do |element|
           build_sub_group(group, element).as(ExampleComponent)
         end
@@ -20,7 +20,7 @@ module Spectator::SpecBuilder
     private def build_sub_group(parent_group, element)
       values = parent_group.context.values.add(@id, @what.to_s, element)
       context = TestContext.new(parent_group.context, ExampleHooks.empty, values)
-      NestedExampleGroup.new("#{@label} = #{element.inspect}", parent_group, context).tap do |group|
+      NestedExampleGroup.new("#{@label} = #{element.inspect}", @source, parent_group, context).tap do |group|
         group.children = children.map do |child|
           child.build(group).as(ExampleComponent)
         end