diff --git a/src/converter_test.zig b/src/converter_test.zig
index c35cf61..b1c4585 100644
--- a/src/converter_test.zig
+++ b/src/converter_test.zig
@@ -130,3 +130,11 @@ test "constant_xor" {
 test "minimal_stack" {
     try invsrc(@src());
 }
+
+test "stack_add" {
+    try invsrc(@src());
+}
+
+test "stack_sub" {
+    try invsrc(@src());
+}
diff --git a/tests/stack_add.bbb b/tests/stack_add.bbb
new file mode 100644
index 0000000..3d7ba44
--- /dev/null
+++ b/tests/stack_add.bbb
@@ -0,0 +1,6 @@
+[export] main = fn [cc(c)] () s32
+{
+    >a: s32 = -1;
+    >b: s32 = 1;
+    return a + b;
+}
diff --git a/tests/stack_sub.bbb b/tests/stack_sub.bbb
new file mode 100644
index 0000000..04ad5cc
--- /dev/null
+++ b/tests/stack_sub.bbb
@@ -0,0 +1,6 @@
+[export] main = fn [cc(c)] () s32
+{
+    >a: s32 = 1;
+    >b: s32 = 1;
+    return a - b;
+}