diff --git a/src/spectator.cr b/src/spectator.cr
index f08083c..2f61c4a 100644
--- a/src/spectator.cr
+++ b/src/spectator.cr
@@ -1,3 +1,5 @@
+require "./spectator/core/**"
+
 # Feature-rich testing framework for Crystal inspired by RSpec.
 module Spectator
   # Current version of the Spectator library.
diff --git a/src/core/example.cr b/src/spectator/core/example.cr
similarity index 97%
rename from src/core/example.cr
rename to src/spectator/core/example.cr
index 9eb45da..e05f056 100644
--- a/src/core/example.cr
+++ b/src/spectator/core/example.cr
@@ -1,4 +1,4 @@
-module Spectator
+module Spectator::Core
   # Information about a test case and functionality for running it.
   class Example
     # Name of the example.
diff --git a/src/core/example_group.cr b/src/spectator/core/example_group.cr
similarity index 96%
rename from src/core/example_group.cr
rename to src/spectator/core/example_group.cr
index 6fcc0f8..44c1a6f 100644
--- a/src/core/example_group.cr
+++ b/src/spectator/core/example_group.cr
@@ -1,4 +1,4 @@
-module Spectator
+module Spectator::Core
   # Information about a group of examples and functionality for running them.
   # The group can be nested.
   class ExampleGroup