diff --git a/tests/tests.bbb b/tests/tests.bbb
new file mode 100644
index 0000000..05a0131
--- /dev/null
+++ b/tests/tests.bbb
@@ -0,0 +1,52 @@
+error() = fn () noreturn
+{
+    #trap();
+}
+
+return_constant = fn () s32 // This is a comment
+// This is a comment
+{ // This is a comment
+    // This is a comment
+    return 0; // This is a comment
+}// This is a comment
+// This is a comment
+
+constant_add = fn () s32
+{
+    return -1 + 1;
+}
+
+constant_and = fn () s32
+{
+    return 1 & 2;
+}
+
+constant_div = fn () s32
+{
+    return 0 / 5;
+}
+
+constant_mul = fn () s32
+{
+    return 1 * 0;
+}
+
+[export] main = fn [cc(c)]
+{
+    >rc = return_constant();
+    if (rc != 0) error();
+
+    >const_add = constant_add();
+    if (const_add != 0) error();
+
+    >const_and = constant_and();
+    if (const_and != 0) error();
+
+    >const_div = constant_div();
+    if (const_div != 0) error();
+
+    >const_mul = constant_mul();
+    if (const_mul != 0) error();
+
+    return 0;
+}