diff --git a/MultipletCombiner.cabal b/MultipletCombiner.cabal
--- a/MultipletCombiner.cabal
+++ b/MultipletCombiner.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           MultipletCombiner
-version:        0.0.1
+version:        0.0.2
 synopsis:       A Haskell implementation for combining SU(n) multiplets.
 description:    See README at <https://github.com/mdrslmr/MultipletCombiner>
 category:       physics,library,science,math,groups
@@ -31,7 +31,8 @@
   hs-source-dirs:
       src
   build-depends:
-      base ==4.15.*
+      HUnit ==1.6.2.0
+    , base >=4.9 && <4.16
   default-language: Haskell2010
 
 test-suite spec
@@ -44,5 +45,6 @@
       src
       tests
   build-depends:
-      base ==4.15.*
+      HUnit ==1.6.2.0
+    , base >=4.9 && <4.16
   default-language: Haskell2010
diff --git a/tests/MultipletCombinerTests.hs b/tests/MultipletCombinerTests.hs
--- a/tests/MultipletCombinerTests.hs
+++ b/tests/MultipletCombinerTests.hs
@@ -1,6 +1,17 @@
+module Main (main) where
+import System.Exit
+
 import Test.HUnit
 import Physics.MultipletCombiner
 
+main :: IO ()
+main = do
+    counts <- runTestTT tests
+    if (errors counts + failures counts == 0)
+        then exitSuccess
+        else exitFailure
+
+
 comb1 = TestCase (assertEqual "[1] >< [1], " [[2],[0]] ([1] >< [1]))
 comb2 = TestCase (assertEqual "[1,0] >< [0,1], " [[1,1],[0,0]] ([1,0] >< [0,1]))
 
@@ -29,4 +40,6 @@
                 TestLabel "yt3" yt3,
                 TestLabel "yt4" yt4,
                 TestLabel "yt5" yt5]
+
+