diff --git a/pygmo/_algorithm_test.py b/pygmo/_algorithm_test.py
index 9ec59987..0074fa32 100644
--- a/pygmo/_algorithm_test.py
+++ b/pygmo/_algorithm_test.py
@@ -25,7 +25,6 @@ def runTest(self):
         self.run_name_info_tests()
         self.run_thread_safety_tests()
         self.run_pickle_tests()
-        self.run_scipy_wrapper_tests()
 
     def run_basic_tests(self):
         # Tests for minimal algorithm, and mandatory methods.
@@ -428,7 +427,16 @@ def run_pickle_tests(self):
         self.assertTrue(a.is_(mbh))
         self.assertTrue(a.extract(mbh).inner_algorithm.is_(_algo))
 
-    def run_scipy_wrapper_tests(self):
+class algorithm_scipy_wrapper_tests(_ut.TestCase):
+    """Test case for the :class:`~pygmo.algorithm` class with the scipy.optimize wrapper."""
+
+    def runTest(self):
+        try:
+            import scipy.version as _sc
+        except ImportError:
+            raise _ut.case.SkipTest("scipy module could not be imported")
+        del _sc
+
         from . import (
             ackley,
             algorithm,
diff --git a/pygmo/test.py b/pygmo/test.py
index 9eff4c72..94f89260 100644
--- a/pygmo/test.py
+++ b/pygmo/test.py
@@ -663,6 +663,11 @@ def runTest(self):
             from .core import free_form, topology, ring
         except ImportError:
             return
+        
+        try:
+            import networkx as nx
+        except ImportError:
+            raise _ut.case.SkipTest("networkx module could not be imported")
 
         # Default ctor.
         udt = free_form()
@@ -693,11 +698,6 @@ def runTest(self):
         self.assertTrue(len(topo.get_connections(3)[1]) == 0)
         self.assertEqual(topo.get_name(), "Free form")
 
-        try:
-            import networkx as nx
-        except ImportError:
-            return
-
         # Constructor from a valid DiGraph.
         g = nx.DiGraph()
         udt = free_form(g)
@@ -3429,6 +3429,7 @@ def run_test_suite(level=0):
     suite.addTest(thread_island_torture_test_case())
     suite.addTest(_problem_test.problem_test_case())
     suite.addTest(_algorithm_test.algorithm_test_case())
+    suite.addTest(_algorithm_test.algorithm_scipy_wrapper_tests())
     suite.addTest(_island_test.mp_island_test_case(level))
     suite.addTest(_island_test.ipyparallel_island_test_case(level))
     suite.addTest(golomb_ruler_test_case())