diff --git a/test/cipher_analytical_machine/symbol_factories_test.clj b/test/cipher_analytical_machine/symbol_factories_test.clj
new file mode 100644
index 0000000..8bb252e
--- /dev/null
+++ b/test/cipher_analytical_machine/symbol_factories_test.clj
@@ -0,0 +1,46 @@
+(ns cipher-analytical-machine.symbol-factories-test
+  (:require
+   [clojure.test :refer :all]
+   [cipher-analytical-machine.symbol_factories :refer :all]
+  ))
+
+(deftest lower-english-alphabet-factory-test
+  (let [symbols (lower-english-alphabet-factory)]
+    (testing "It must have same order"
+      (is (= "abcdefghijklmnopqrstuvwxyz" symbols)))
+
+    (testing "It must have 26 letters"
+      (is (= 26 (count symbols))))))
+
+(deftest english-alphabet-factory-test
+  (let [symbols (english-alphabet-factory)]
+    (testing "It must have same order"
+      (is (= "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" symbols)))
+
+    (testing "It must have 2*26 letters"
+      (is (= (* 2 26) (count symbols))))))
+
+(deftest lower-ukrainian-alphabet-factory-test
+  (let [symbols (lower-ukrainian-alphabet-factory)]
+    (testing "It must have same order"
+      (is (= "абвгґдеєжзиіїйклмнопрстуфхцчшщьюя" symbols)))
+
+    (testing "It must have 33 letters"
+      (is (= 33 (count symbols))))))
+
+(deftest ukrainian-alphabet-factory-test
+  (let [symbols (ukrainian-alphabet-factory)]
+    (testing "It must have same order"
+      (is (= "абвгґдеєжзиіїйклмнопрстуфхцчшщьюяАБВГҐДЕЄЖЗИІЇЙКЛМНОПРСТУФХЦЧШЩЬЮЯ" symbols)))
+
+    (testing "It must have 2*33 letters"
+      (is (= (* 2 33) (count symbols))))))
+
+(deftest digit-set-factory-test
+  (let [symbols (digit-set-factory)]
+    (testing "It must have same order"
+      (is (= "0123456789" symbols)))
+
+    (testing "It must have 10 digits"
+      (is (= 10 (count symbols))))))
+