diff --git a/t/euler1.t b/t/euler1.t
new file mode 100644
index 0000000..cefd969
--- /dev/null
+++ b/t/euler1.t
@@ -0,0 +1,5 @@
+(defun range (start end)
+  (do ((lst (list) (cons i lst)) (i start (+ 1 i))) ((= i end) lst)))
+
+(let ((result (reduce + (filter (lambda (x) (or (zerop (mod x 3)) (zerop (mod x 5)))) (range 1 1000)))))
+  (expect "euler1 - result is 233168" (= result 233168)))
diff --git a/t/euler2.t b/t/euler2.t
new file mode 100644
index 0000000..67d4bd2
--- /dev/null
+++ b/t/euler2.t
@@ -0,0 +1,5 @@
+(let ((result
+       (do ((a 1 b) (b 2 (+ a b)) (sum 0)) ((> b 4000000) sum)
+           (when (evenp b)
+             (set sum (+ sum b))))))
+  (expect "euler 2 - result is 4613732" (= result 4613732)))