diff --git a/ogcore/pensions.py b/ogcore/pensions.py
index ce1f80815..47c65139f 100644
--- a/ogcore/pensions.py
+++ b/ogcore/pensions.py
@@ -445,18 +445,15 @@ def deriv_DB(w, e, per_rmn, p):
     Change in DB pension benefits for another unit of labor supply
     """
 
-    if per_rmn < (p.S - p.S_ret + 1):
+    if per_rmn < (p.S - p.retire + 1):
         d_theta = np.zeros(p.S)
     else:
-        d_theta_empty = np.zeros(p.S)
         d_theta = deriv_DB_loop(
             w,
             e,
             p.S,
-            p.S_ret,
+            p.retire,
             per_rmn,
-            p.g_y,
-            d_theta_empty,
             p.last_career_yrs,
             p.rep_rate_py,
             p.yr_contr,
diff --git a/tests/test_pensions.py b/tests/test_pensions.py
index 0a88d1018..fcfe5b5e8 100644
--- a/tests/test_pensions.py
+++ b/tests/test_pensions.py
@@ -222,3 +222,54 @@ def test_deriv_PS_loop(args, deriv_PS_loop_expected):
     )
 
     assert np.allclose(deriv_PS_loop, deriv_PS_loop_expected)
+
+
+#############non-zero d_theta: case 1############
+p = Specifications()
+p.S = 7
+p.retire = 4
+p.last_career_yrs = 3
+p.yr_contr = p.retire
+p.rep_rate_py = 0.2
+p.g_y = 0.03
+n_ddb1 = np.array([0.4, 0.45, 0.4, 0.42, 0.3, 0.2, 0.2])
+w_ddb1 = np.array([1.2, 1.1, 1.21, 1, 1.01, 0.99, 0.8])
+e_ddb1 = np.array([1.1, 1.11, 0.9, 0.87, 0.87, 0.7, 0.6])
+per_rmn = n_ddb1.shape[0]
+d_theta_empty = np.zeros_like(per_rmn)
+deriv_DB_expected1 = np.array(
+    [0.352, 0.3256, 0.2904, 0.232, 0.0, 0.0, 0.0])
+args_ddb1 = (w_ddb1, e_ddb1, per_rmn, p)
+
+#############non-zero d_theta: case 2############
+p2 = Specifications()
+p2.S = 7
+p2.retire = 5
+p2.last_career_yrs = 2
+p2.yr_contr = p2.retire
+p2.rep_rate_py = 0.2
+p2.g_y = 0.03
+n_ddb2 = np.array([0.45, 0.4, 0.42, 0.3, 0.2, 0.2])
+w_ddb1 = np.array([1.1, 1.21, 1, 1.01, 0.99, 0.8])
+e_ddb1 = np.array([1.11, 0.9, 0.87, 0.87, 0.7, 0.6])
+per_rmn = n_ddb2.shape[0]
+d_theta_empty = np.zeros_like(per_rmn)
+deriv_DB_expected2 = np.array(
+    [0.6105, 0.5445, 0.435, 0.43935, 0.0, 0.0])
+args_ddb2 = (w_ddb1, e_ddb1, per_rmn, p2)
+
+test_data = [(args_ddb1, deriv_DB_expected1),
+             (args_ddb2, deriv_DB_expected2)]
+
+
+@pytest.mark.parametrize('args,deriv_DB_expected', test_data,
+                         ids=['non-zero d_theta: case 1',
+                              'non-zero d_theta: case 2'])
+def test_deriv_DB(args, deriv_DB_expected):
+    """
+    Test of the pensions.deriv_DB() function.
+    """
+    (w, e, per_rmn, p) = args
+    deriv_DB = pensions.deriv_DB(w, e, per_rmn, p)
+
+    assert (np.allclose(deriv_DB, deriv_DB_expected))
\ No newline at end of file