diff --git a/tests/TestCIT_FastKCI.py b/tests/TestCIT_FastKCI.py
index 06a84ba..b8507f7 100644
--- a/tests/TestCIT_FastKCI.py
+++ b/tests/TestCIT_FastKCI.py
@@ -25,6 +25,9 @@ def test_Gaussian_dist(self):
                     pvalue03.append(round(cit_CIT(0, 3), 4))
                     pvalue032.append(round(cit_CIT(0, 3, {2}), 4))
 
+        pvalue01 = np.array(pvalue01)
+        pvalue03 = np.array(pvalue03)
+        pvalue032 = np.array(pvalue032)
         self.assertTrue(np.all((0.0 <= pvalue01) & (pvalue01 <= 1.0)),
                         "pvalue01 contains invalid values")
         self.assertTrue(np.all((0.0 <= pvalue03) & (pvalue03 <= 1.0)),
diff --git a/tests/TestCIT_RCIT.py b/tests/TestCIT_RCIT.py
index 2482f97..ef6406f 100644
--- a/tests/TestCIT_RCIT.py
+++ b/tests/TestCIT_RCIT.py
@@ -27,6 +27,9 @@ def test_Gaussian_dist(self):
                         pvalue03.append(round(cit_CIT(0, 3), 4))
                         pvalue032.append(round(cit_CIT(0, 3, {2}), 4))
 
+        pvalue01 = np.array(pvalue01)
+        pvalue03 = np.array(pvalue03)
+        pvalue032 = np.array(pvalue032)
         self.assertTrue(np.all((0.0 <= pvalue01) & (pvalue01 <= 1.0)),
                         "pvalue01 contains invalid values")
         self.assertTrue(np.all((0.0 <= pvalue03) & (pvalue03 <= 1.0)),