diff --git a/pint/compat.py b/pint/compat.py
index 32ad04afb..b968803ce 100644
--- a/pint/compat.py
+++ b/pint/compat.py
@@ -75,7 +75,8 @@ class BehaviorChangeWarning(UserWarning):
 
 try:
     from uncertainties import UFloat, ufloat
-    from uncertainties import unumpy as unp
+
+    unp = None
 
     HAS_UNCERTAINTIES = True
 except ImportError:
@@ -92,6 +93,8 @@ class BehaviorChangeWarning(UserWarning):
     HAS_NUMPY = True
     NUMPY_VER = np.__version__
     if HAS_UNCERTAINTIES:
+        from uncertainties import unumpy as unp
+
         NUMERIC_TYPES = (Number, Decimal, ndarray, np.number, UFloat)
     else:
         NUMERIC_TYPES = (Number, Decimal, ndarray, np.number)
diff --git a/pint/testsuite/test_issues.py b/pint/testsuite/test_issues.py
index c4e42eacc..f726a950c 100644
--- a/pint/testsuite/test_issues.py
+++ b/pint/testsuite/test_issues.py
@@ -940,6 +940,7 @@ def test_issue_1400(self, sess_registry):
         assert q2.format_babel("~", locale="es_ES") == "3,1 W/cm"
         assert q2.format_babel("", locale="es_ES") == "3,1 vatios por centímetro"
 
+    @helpers.requires_numpy()
     @helpers.requires_uncertainties()
     def test_issue1611(self, module_registry):
         from numpy.testing import assert_almost_equal