diff --git a/.github/test_real.sh b/.github/test_real.sh
index 4af0258e2..d624a7459 100755
--- a/.github/test_real.sh
+++ b/.github/test_real.sh
@@ -11,4 +11,4 @@ cd tests
 # we have to copy over the coveragerc file to make sure it's in the
 # same directory where codecov is run
 cp ../.coveragerc .
-testflo --pre_announce --disallow_deprecations -v --coverage --coverpkg pyoptsparse $EXTRA_FLAGS
+testflo -i --pre_announce --disallow_deprecations -v --coverage --coverpkg pyoptsparse $EXTRA_FLAGS
diff --git a/.github/workflows/linux-build.yml b/.github/workflows/linux-build.yml
index 0e4e28295..ba4f70a65 100644
--- a/.github/workflows/linux-build.yml
+++ b/.github/workflows/linux-build.yml
@@ -31,4 +31,4 @@ jobs:
       - name: Run tests
         run: |
           cd tests
-          testflo --pre_announce -v -n 1 .
+          testflo -i --pre_announce -v -n 1 .
diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
index 440fee202..54b3e1093 100644
--- a/.github/workflows/windows-build.yml
+++ b/.github/workflows/windows-build.yml
@@ -52,4 +52,4 @@ jobs:
         run: |
           conda activate pyos-build
           cd tests
-          testflo --pre_announce -v -n 1 .
+          testflo -i --pre_announce -v -n 1 .
diff --git a/pyoptsparse/pyNSGA2/pyNSGA2.py b/pyoptsparse/pyNSGA2/pyNSGA2.py
index 8bd340ed0..12a0d5987 100644
--- a/pyoptsparse/pyNSGA2/pyNSGA2.py
+++ b/pyoptsparse/pyNSGA2/pyNSGA2.py
@@ -34,6 +34,9 @@ def __init__(self, raiseError=True, options={}):
         if isinstance(nsga2, str) and raiseError:
             raise ImportError(nsga2)
 
+        if self.getOption("PopSize") % 4 != 0:
+            raise ValueError("Option 'PopSize' must be a multiple of 4")
+
     @staticmethod
     def _getInforms():
         informs = {}
diff --git a/pyoptsparse/pyNSGA2/source/allocate.c b/pyoptsparse/pyNSGA2/source/allocate.c
index 271d9069d..993bfe056 100644
--- a/pyoptsparse/pyNSGA2/source/allocate.c
+++ b/pyoptsparse/pyNSGA2/source/allocate.c
@@ -30,7 +30,7 @@ void allocate_memory_ind (individual *ind, Global global)
     if (global.nbin != 0)
     {
         ind->xbin = (double *)malloc(global.nbin*sizeof(double));
-        ind->gene = (int **)malloc(global.nbin*sizeof(int));
+        ind->gene = (int **)malloc(global.nbin*sizeof(int *));
         for (j=0; j<global.nbin; j++)
         {
             ind->gene[j] = (int *)malloc(global.nbits[j]*sizeof(int));
diff --git a/pyoptsparse/pyNSGA2/source/crowddist.c b/pyoptsparse/pyNSGA2/source/crowddist.c
index 4b33b4cc1..7332216b4 100644
--- a/pyoptsparse/pyNSGA2/source/crowddist.c
+++ b/pyoptsparse/pyNSGA2/source/crowddist.c
@@ -26,7 +26,7 @@ void assign_crowding_distance_list (population *pop, list *lst, int front_size,
         pop->ind[lst->child->index].crowd_dist = INF;
         return;
     }
-    obj_array = (int **)malloc(global.nobj*sizeof(int));
+    obj_array = (int **)malloc(global.nobj*sizeof(int *));
     dist = (int *)malloc(front_size*sizeof(int));
     for (i=0; i<global.nobj; i++)
     {
@@ -66,7 +66,7 @@ void assign_crowding_distance_indices (population *pop, int c1, int c2, Global g
         pop->ind[c2].crowd_dist = INF;
         return;
     }
-    obj_array = (int **)malloc(global.nobj*sizeof(int));
+    obj_array = (int **)malloc(global.nobj*sizeof(int *));
     dist = (int *)malloc(front_size*sizeof(int));
     for (i=0; i<global.nobj; i++)
     {
diff --git a/tests/test_nsga2_multi_objective.py b/tests/test_nsga2_multi_objective.py
index 5d9f2b7eb..b74bab019 100644
--- a/tests/test_nsga2_multi_objective.py
+++ b/tests/test_nsga2_multi_objective.py
@@ -52,7 +52,7 @@ def setup_optProb(self, n_obj):
     @parameterized.expand(
         [
             (1,),
-            # (2,), # skipping flaky multi-objective test
+            (2,),
         ]
     )
     def test_opt(self, n_obj):
@@ -73,6 +73,13 @@ def test_opt(self, n_obj):
             assert_allclose(sol.fStar["obj1"], 12.0, atol=tol, rtol=tol)
             assert_allclose(sol.fStar["obj2"], 0.0, atol=tol, rtol=tol)
 
+    def test_options(self):
+        with self.assertRaises(ValueError):
+            # PopSize must be a multiple of 4
+            self.setup_optProb(1)
+            optOptions = {"PopSize": 5}
+            self.optimize(optOptions=optOptions)
+
 
 if __name__ == "__main__":
     unittest.main()