diff --git a/test/Main.hs b/test/Main.hs
index d8359ae..ced2be3 100644
--- a/test/Main.hs
+++ b/test/Main.hs
@@ -1,6 +1,8 @@
 module Main where
 
 import Test.HUnit
+import Encoding.Base91 (enc91, dec91)
+import Encoding.Base85 (enc85, dec85)
 import Encoding.Base64 (enc64, dec64)
 import Encoding.Base45 (enc45, dec45)
 import Encoding.Base32 (enc32, dec32)
@@ -9,7 +11,30 @@ import Encoding.Base8  (enc8,  dec8)
 import Encoding.Base2  (enc2,  dec2)
 import System.Exit (exitFailure, exitSuccess)
 
--- Test cases for enc64 function
+testEnc91 :: Test
+testEnc91 = TestCase $ do
+    assertEqual "for (enc91 \"Hello, World!\")," ">OwJh>}AQ;r@@Y?F" (enc91 "Hello, World!")
+    assertEqual "for (enc91 \"Haskell\")," "3D8=d,[*G" (enc91 "Haskell")
+    assertEqual "for (enc91 \"😂\")," "=~m6g" (enc91 "😂")
+
+testDec91 :: Test
+testDec91 = TestCase $ do
+    assertEqual "for (dec91 \">OwJh>}AQ;r@@Y?F\")," "Hello, World!" (dec91 ">OwJh>}AQ;r@@Y?F")
+    assertEqual "for (dec91 \"3D8=d,[*G\")," "Haskell" (dec91 "3D8=d,[*G")
+    assertEqual "for (dec91 \"=~m6g\")," "😂" (dec91 "=~m6g")
+
+testEnc85 :: Test
+testEnc85 = TestCase $ do
+    assertEqual "for (enc85 \"Hello, World!\")," "87cURD_*#4DfTZ)+T" (enc85 "Hello, World!")
+    assertEqual "for (enc85 \"Haskell\")," "87?RTASc/" (enc85 "Haskell")
+    assertEqual "for (enc85 \"😂\")," "n=Q)\"" (enc85 "😂")
+
+testDec85 :: Test
+testDec85 = TestCase $ do
+    assertEqual "for (dec85 \"87cURD_*#4DfTZ)+T\")," "Hello, World!" (dec85 "87cURD_*#4DfTZ)+T")
+    assertEqual "for (dec85 \"87?RTASc/\")," "Haskell" (dec85 "87?RTASc/")
+    assertEqual "for (dec85 \"n=Q)\"\")," "😂" (dec85 "n=Q)\"")
+
 testEnc64 :: Test
 testEnc64 = TestCase $ do
     assertEqual "for (enc64 \"hello\")," "aGVsbG8=" (enc64 "hello")
@@ -17,7 +42,6 @@ testEnc64 = TestCase $ do
     assertEqual "for (enc64 \"\x00\x01\x02\")," "AAEC" (enc64 "\x00\x01\x02")
     assertEqual "for (enc64 \"😂\")," "8J+Ygg==" (enc64 "😂")
 
--- Test cases for dec64 function
 testDec64 :: Test
 testDec64 = TestCase $ do
     assertEqual "for (dec64 \"aGVsbG8=\")," "hello" (dec64 "aGVsbG8=")
@@ -87,10 +111,14 @@ testDec2 = TestCase $ do
     assertEqual "for (dec2 \"11110000 10011111 10011000 10000010\")," "😂" (dec2 "11110000 10011111 10011000 10000010")
 
 tests :: Test
-tests = TestList [TestLabel "Test enc64" testEnc64,
+tests = TestList [TestLabel "Test enc91" testEnc91,
+                  TestLabel "Test dec91" testDec91,
+                  TestLabel "Test enc85" testEnc85,
+                  TestLabel "Test dec85" testDec85,
+                  TestLabel "Test enc64" testEnc64,
                   TestLabel "Test dec64" testDec64,
-                  TestLabel "Test enc32" testEnc45,
-                  TestLabel "Test dec32" testDec45,
+                  TestLabel "Test enc45" testEnc45,
+                  TestLabel "Test dec45" testDec45,
                   TestLabel "Test enc32" testEnc32,
                   TestLabel "Test dec32" testDec32,
                   TestLabel "Test enc16" testEnc16,