diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index fe3b8b8..0ab0309 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -14,28 +14,28 @@ jobs:
             stack_yaml: 'stack-ghc-8.8.yaml'
             stack_args: '--coverage --haddock --no-haddock-deps'
             stack_test_args: ''
-            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve'
+            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:TestGurobiCl'
             coveralls: true
           - ghc: '8.8.4'
             os: ubuntu-latest
             stack_yaml: 'stack-ghc-8.8.yaml'
             stack_args: ''
             stack_test_args: ''
-            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:-WithZLIB'
+            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:TestGurobiCl --flag MIP:-WithZLIB'
             coveralls: false
           - ghc: '8.8.4'
             os: macos-latest
             stack_yaml: 'stack-ghc-8.8.yaml'
             stack_args: ''
             stack_test_args: ''
-            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve'
+            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:TestGurobiCl'
             coveralls: false
           - ghc: '8.8.4'
             os: windows-latest
             stack_yaml: 'stack-ghc-8.8.yaml'
             stack_args: '--arch x86_64'
             stack_test_args: '-j1'  # https://github.com/commercialhaskell/stack/issues/5024
-            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve'
+            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:TestGurobiCl'
             coveralls: false
             windows_32_or_64: '64'
           - ghc: '8.6.3'
@@ -43,7 +43,7 @@ jobs:
             stack_yaml: 'stack-windows-i386.yaml'
             stack_args: '--arch i386'
             stack_test_args: '-j1'  # https://github.com/commercialhaskell/stack/issues/5024
-            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve'
+            flags: '--flag MIP:TestCBC --flag MIP:TestGlpsol --flag MIP:TestLPSolve --flag MIP:TestGurobiCl'
             coveralls: false
             windows_32_or_64: '32'
     steps:
@@ -58,6 +58,14 @@ jobs:
           stack-no-global: true
           stack-setup-ghc: true
 
+      - uses: s-weigand/setup-conda@v1
+        name: Setup Conda
+        with: 
+          conda-channels: 'http://conda.anaconda.org/gurobi'
+
+      - name: Install Gurobi
+        run: conda install gurobi
+
       - name: Install packages (Linux)
         if: runner.os == 'Linux'
         run: sudo apt-get install coinor-cbc glpk-utils libglpk-dev lp-solve
diff --git a/MIP/test/Test/MIPSolver.hs b/MIP/test/Test/MIPSolver.hs
index 54e38ec..6924aab 100644
--- a/MIP/test/Test/MIPSolver.hs
+++ b/MIP/test/Test/MIPSolver.hs
@@ -133,8 +133,8 @@ case_gurobiCl = do
   sol @?=
     MIP.Solution
     { MIP.solStatus = MIP.StatusOptimal
-    , MIP.solObjectiveValue = Just 122.50000000000006
-    , MIP.solVariables = Map.fromList [("x1", 40), ("x2", 10.5), ("x3", 19.500000000000018), ("x4", 3)]
+    , MIP.solObjectiveValue = Just 122.5
+    , MIP.solVariables = Map.fromList [("x1", 40), ("x2", 10.5), ("x3", 19.5), ("x4", 3)]
     }
 
 case_gurobiCl_unbounded :: Assertion