diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d748957..42c2bb6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -65,6 +65,7 @@ functionaltest("not")
 functionaltest("type")
 functionaltest("if")
 functionaltest("while")
+functionaltest("eq")
 
 install(TARGETS apfl DESTINATION lib)
 install(TARGETS apfl-bin DESTINATION bin)
diff --git a/src/functional-tests/eq.at b/src/functional-tests/eq.at
new file mode 100644
index 0000000..e577a93
--- /dev/null
+++ b/src/functional-tests/eq.at
@@ -0,0 +1,40 @@
+===== script =====
+print (== 1 1)
+print (== 1 1 1)
+print (== 1 2)
+print (== 1 1 2)
+print (== nil false)
+print (== false false)
+print (== true false)
+print (== [] [])
+print (== [1] [])
+print (== [1] [2])
+print (== [1] [1])
+print (== [[1]] [[1]])
+print (== "Hello" 'Hello)
+print (== "Hello" 'World)
+print (== ['foo -> [1 2 3]] ['foo -> [1 2 3]])
+print (== ['foo -> [1 2 3]] ['foo -> [1 2 4]])
+print (== {x -> * x 2} {x -> * x 2})
+f = {x -> * x 2}
+print (== f f)
+
+===== output =====
+true
+true
+false
+false
+false
+true
+false
+true
+false
+false
+true
+true
+true
+false
+true
+false
+false
+true