diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e8268fe3..56717533 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -86,6 +86,11 @@ jobs:
           MYSQL_DATABASE: statesman_test
         ports:
           - "3306:3306"
+        options: >-
+          --health-cmd "mysqladmin ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
     env:
       DATABASE_URL: mysql2://foobar:password@127.0.0.1/statesman_test
       DATABASE_DEPENDENCY_PORT: "3306"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2018fea..b24609d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## v10.1.0 10th March 2023
+
+### CHanged
+- Add the source location of the guard callback to `Statesman::GuardFailedError`
+
 ## v10.0.0 17th May 2022
 
 ### Changed
diff --git a/lib/statesman/exceptions.rb b/lib/statesman/exceptions.rb
index 214b8d21..96adcc51 100644
--- a/lib/statesman/exceptions.rb
+++ b/lib/statesman/exceptions.rb
@@ -28,13 +28,15 @@ def _message
   end
 
   class GuardFailedError < StandardError
-    def initialize(from, to)
+    def initialize(from, to, callback)
       @from = from
       @to = to
+      @callback = callback
       super(_message)
+      set_backtrace(callback.source_location.join(":")) if callback&.source_location
     end
 
-    attr_reader :from, :to
+    attr_reader :from, :to, :callback
 
     private
 
diff --git a/lib/statesman/guard.rb b/lib/statesman/guard.rb
index 475f04b3..50a87b1b 100644
--- a/lib/statesman/guard.rb
+++ b/lib/statesman/guard.rb
@@ -6,7 +6,7 @@
 module Statesman
   class Guard < Callback
     def call(*args)
-      raise GuardFailedError.new(from, to) unless super(*args)
+      raise GuardFailedError.new(from, to, callback) unless super(*args)
     end
   end
 end
diff --git a/lib/statesman/version.rb b/lib/statesman/version.rb
index 76b7f3e0..cc251524 100644
--- a/lib/statesman/version.rb
+++ b/lib/statesman/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Statesman
-  VERSION = "10.0.0"
+  VERSION = "10.1.0"
 end
diff --git a/spec/statesman/adapters/active_record_queries_spec.rb b/spec/statesman/adapters/active_record_queries_spec.rb
index e3c78c9c..685734eb 100644
--- a/spec/statesman/adapters/active_record_queries_spec.rb
+++ b/spec/statesman/adapters/active_record_queries_spec.rb
@@ -117,8 +117,8 @@ def configure_new(klass, transition_class)
         subject(:not_in_state) { MyActiveRecordModel.not_in_state(:succeeded, :failed) }
 
         it do
-          expect(not_in_state).to match_array([initial_state_model,
-                                               returned_to_initial_model])
+          expect(not_in_state).to contain_exactly(initial_state_model,
+                                                  returned_to_initial_model)
         end
       end
 
@@ -126,8 +126,8 @@ def configure_new(klass, transition_class)
         subject(:not_in_state) { MyActiveRecordModel.not_in_state(%i[succeeded failed]) }
 
         it do
-          expect(not_in_state).to match_array([initial_state_model,
-                                               returned_to_initial_model])
+          expect(not_in_state).to contain_exactly(initial_state_model,
+                                                  returned_to_initial_model)
         end
       end
     end
diff --git a/spec/statesman/exceptions_spec.rb b/spec/statesman/exceptions_spec.rb
index 73189385..275a6d60 100644
--- a/spec/statesman/exceptions_spec.rb
+++ b/spec/statesman/exceptions_spec.rb
@@ -64,12 +64,18 @@
   end
 
   describe "GuardFailedError" do
-    subject(:error) { Statesman::GuardFailedError.new("from", "to") }
+    subject(:error) { Statesman::GuardFailedError.new("from", "to", callback) }
+
+    let(:callback) { -> { "hello" } }
 
     its(:message) do
       is_expected.to eq("Guard on transition from: 'from' to 'to' returned false")
     end
 
+    its(:backtrace) do
+      is_expected.to eq([callback.source_location.join(":")])
+    end
+
     its "string matches its message" do
       expect(error.to_s).to eq(error.message)
     end
diff --git a/spec/statesman/machine_spec.rb b/spec/statesman/machine_spec.rb
index c7b8bfb6..d8b748b5 100644
--- a/spec/statesman/machine_spec.rb
+++ b/spec/statesman/machine_spec.rb
@@ -935,10 +935,10 @@ def after_initialize; end
       it { is_expected.to be(:some_state) }
     end
 
-    context "when it is unsuccesful" do
+    context "when it is unsuccessful" do
       before do
         allow(instance).to receive(:transition_to!).
-          and_raise(Statesman::GuardFailedError.new(:x, :some_state))
+          and_raise(Statesman::GuardFailedError.new(:x, :some_state, nil))
       end
 
       it { is_expected.to be_falsey }