diff --git a/chapter-10-testing/examples/AutoBrake.h b/chapter-10-testing/examples/AutoBrake.h
index 5ce2ef4..190c377 100644
--- a/chapter-10-testing/examples/AutoBrake.h
+++ b/chapter-10-testing/examples/AutoBrake.h
@@ -1,6 +1,7 @@
 // AutoBrake class template
 #pragma once
 
+#include <iostream>
 #include <stdexcept>
 
 #include "AutoBrakePods.h"
diff --git a/chapter-10-testing/examples/test_AutoBrake b/chapter-10-testing/examples/test_AutoBrake
index b526b79..5e6ada8 100755
Binary files a/chapter-10-testing/examples/test_AutoBrake and b/chapter-10-testing/examples/test_AutoBrake differ
diff --git a/chapter-10-testing/examples/test_AutoBrake.cpp b/chapter-10-testing/examples/test_AutoBrake.cpp
index e40a993..f005169 100644
--- a/chapter-10-testing/examples/test_AutoBrake.cpp
+++ b/chapter-10-testing/examples/test_AutoBrake.cpp
@@ -1,6 +1,7 @@
 // Autobrake unit tests
 
 #include <cstdio>
+#include <iostream>
 #include <stdexcept>
 
 #include "AutoBrake.h"
@@ -45,11 +46,11 @@ void speed_is_saved() {
 
 void alert_when_imminent() {
     int brake_commands_published{};
-    AutoBrake auto_brake{
-        [&brake_commands_published](const BrakeCommand&) {
+    auto count_brake_commands = 
+        [&brake_commands_published](const BrakeCommand) {
             brake_commands_published++;
-        }
-    };
+        };
+    AutoBrake auto_brake{ count_brake_commands };
     auto_brake.set_collision_threshold_s(10L);
     auto_brake.observe(SpeedUpdate{ 100L });
     auto_brake.observe(CarDetected{ 100L, 0L});
diff --git a/chapter-10-testing/examples/test_capture b/chapter-10-testing/examples/test_capture
new file mode 100755
index 0000000..d002dd7
Binary files /dev/null and b/chapter-10-testing/examples/test_capture differ
diff --git a/chapter-10-testing/examples/test_capture.cpp b/chapter-10-testing/examples/test_capture.cpp
new file mode 100644
index 0000000..1a21725
--- /dev/null
+++ b/chapter-10-testing/examples/test_capture.cpp
@@ -0,0 +1,10 @@
+// Test_capture
+
+#include <functional>
+#include <iostream>
+
+int main() {
+    int num {};
+    std::function test_func = [&num]() {num ++;};
+    std::cout << num;
+}