diff --git a/about_maps.go b/about_maps.go
index d2af559..6239582 100644
--- a/about_maps.go
+++ b/about_maps.go
@@ -11,11 +11,11 @@ func aboutMaps() {
   assert(age == __int__) // map syntax is warmly familiar
 
   age, ok := ages["bob"]
-  assert(ok == __bool__) // with a handy addition for presence checking
+  assert(ok == __bool__) // with a handy multiple-assignment variation
 
   age, ok = ages["steven"]
   assert(age == __int__) // the zero value is used when absent
-  assert(__bool__)       // though there are better ways to check for presence
+  assert(ok == __boolean__)       // though there are better ways to check for presence
 
   assert(len(ages) == __int__) // length is based on keys
 
@@ -27,5 +27,5 @@ func aboutMaps() {
 
   delete(ages, "steven")
   age, ok = ages["steven"]
-  assert(__bool__) // key/value pairs can be removed
+  assert(ok == __boolean__) // key/value pairs can be removed
 }
diff --git a/setup_koans_test.go b/setup_koans_test.go
index 28c63b6..4dcd709 100644
--- a/setup_koans_test.go
+++ b/setup_koans_test.go
@@ -15,6 +15,7 @@ const (
   __int__ int = -1
   __byte__ byte = 255
   __bool__ bool = false // ugh
+  __boolean__ bool = true // oh well
   __float32__ float32 = -1.0
   __delete_me__ bool = false
 )