diff --git a/matlab/@dynDates/uminus.m b/matlab/@dynDates/uminus.m
index 5f4090f37..027bb7c73 100644
--- a/matlab/@dynDates/uminus.m
+++ b/matlab/@dynDates/uminus.m
@@ -58,4 +58,21 @@ B.time(idx,2) = B.freq;
 %$ t(4) = dyn_assert(i4,1);
 %$ t(5) = dyn_assert(i5,1);
 %$ T = all(t);
-%@eof:1
\ No newline at end of file
+%@eof:1
+
+%@test:2
+%$ d1 = dynDates('1950Q1','1950Q2','1950Q3','1950Q4','1951Q1');
+%$ d2 = dynDates('1949Q4','1950Q1','1950Q2','1950Q3','1950Q4');
+%$ try
+%$   d3 = -d1;
+%$   t(1) = 1;
+%$ catch
+%$   t(1) = 0;
+%$ end
+%$
+%$ if t(1)
+%$   t(2) = dyn_assert(all(d2==d3),1);
+%$ end
+%$
+%$ T = all(t);
+%@eof:2
\ No newline at end of file
diff --git a/matlab/@dynDates/uplus.m b/matlab/@dynDates/uplus.m
index 3d5b02993..9e36c012d 100644
--- a/matlab/@dynDates/uplus.m
+++ b/matlab/@dynDates/uplus.m
@@ -58,4 +58,21 @@ B.time(idx,2) = 1;
 %$ t(4) = dyn_assert(i4,1);
 %$ t(5) = dyn_assert(i5,1);
 %$ T = all(t);
-%@eof:1
\ No newline at end of file
+%@eof:1
+
+%@test:2
+%$ d1 = dynDates('1950Q1','1950Q2','1950Q3','1950Q4','1951Q1');
+%$ d2 = dynDates('1950Q2','1950Q3','1950Q4','1951Q1','1951Q2');
+%$ try
+%$   d3 = +d1;
+%$   t(1) = 1;
+%$ catch
+%$   t(1) = 0;
+%$ end
+%$
+%$ if t(1)
+%$   t(2) = dyn_assert(all(d2==d3),1);
+%$ end
+%$
+%$ T = all(t);
+%@eof:2
\ No newline at end of file