diff --git a/tests/4-opt/testcases/9_licm_bad.cminus b/tests/4-opt/testcases/10_licm_bad.cminus
similarity index 97%
rename from tests/4-opt/testcases/9_licm_bad.cminus
rename to tests/4-opt/testcases/10_licm_bad.cminus
index 56312c1a9d8ef2bf7e6aa223d0baebfa3e8999d8..1ce2a95c4e27431b7ee4b530f69c05e2e66d4e5a 100644
--- a/tests/4-opt/testcases/9_licm_bad.cminus
+++ b/tests/4-opt/testcases/10_licm_bad.cminus
@@ -6,7 +6,6 @@ int main(void) {
   int b;
   t = 0;
   b = 1;
-  a = 0;
   while (t < 0) {
     a = b / b + b * b + a;
     a = b / b + b * b + a;
diff --git a/tests/4-opt/testcases/9_licm_bad.out b/tests/4-opt/testcases/10_licm_bad.out
similarity index 100%
rename from tests/4-opt/testcases/9_licm_bad.out
rename to tests/4-opt/testcases/10_licm_bad.out
diff --git a/tests/4-opt/testcases/2_lab2_lv2.cminus b/tests/4-opt/testcases/3_lab2_lv2.cminus
similarity index 100%
rename from tests/4-opt/testcases/2_lab2_lv2.cminus
rename to tests/4-opt/testcases/3_lab2_lv2.cminus
diff --git a/tests/4-opt/testcases/2_lab2_lv2.out b/tests/4-opt/testcases/3_lab2_lv2.out
similarity index 100%
rename from tests/4-opt/testcases/2_lab2_lv2.out
rename to tests/4-opt/testcases/3_lab2_lv2.out
diff --git a/tests/4-opt/testcases/3_complex1.cminus b/tests/4-opt/testcases/4_complex1.cminus
similarity index 100%
rename from tests/4-opt/testcases/3_complex1.cminus
rename to tests/4-opt/testcases/4_complex1.cminus
diff --git a/tests/4-opt/testcases/3_complex1.out b/tests/4-opt/testcases/4_complex1.out
similarity index 100%
rename from tests/4-opt/testcases/3_complex1.out
rename to tests/4-opt/testcases/4_complex1.out
diff --git a/tests/4-opt/testcases/4_complex2.cminus b/tests/4-opt/testcases/5_complex2.cminus
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/4_complex2.cminus
rename to tests/4-opt/testcases/5_complex2.cminus
diff --git a/tests/4-opt/testcases/4_complex2.in b/tests/4-opt/testcases/5_complex2.in
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/4_complex2.in
rename to tests/4-opt/testcases/5_complex2.in
diff --git a/tests/4-opt/testcases/4_complex2.out b/tests/4-opt/testcases/5_complex2.out
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/4_complex2.out
rename to tests/4-opt/testcases/5_complex2.out
diff --git a/tests/4-opt/testcases/5_complex3.cminus b/tests/4-opt/testcases/6_complex3.cminus
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/5_complex3.cminus
rename to tests/4-opt/testcases/6_complex3.cminus
diff --git a/tests/4-opt/testcases/5_complex3.in b/tests/4-opt/testcases/6_complex3.in
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/5_complex3.in
rename to tests/4-opt/testcases/6_complex3.in
diff --git a/tests/4-opt/testcases/5_complex3.out b/tests/4-opt/testcases/6_complex3.out
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/5_complex3.out
rename to tests/4-opt/testcases/6_complex3.out
diff --git a/tests/4-opt/testcases/6_complex4.cminus b/tests/4-opt/testcases/7_complex4.cminus
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/6_complex4.cminus
rename to tests/4-opt/testcases/7_complex4.cminus
diff --git a/tests/4-opt/testcases/6_complex4.out b/tests/4-opt/testcases/7_complex4.out
old mode 100755
new mode 100644
similarity index 100%
rename from tests/4-opt/testcases/6_complex4.out
rename to tests/4-opt/testcases/7_complex4.out
diff --git a/tests/4-opt/testcases/7_return_early.cminus b/tests/4-opt/testcases/8_return_early.cminus
similarity index 100%
rename from tests/4-opt/testcases/7_return_early.cminus
rename to tests/4-opt/testcases/8_return_early.cminus
diff --git a/tests/4-opt/testcases/7_return_early.in b/tests/4-opt/testcases/8_return_early.in
similarity index 100%
rename from tests/4-opt/testcases/7_return_early.in
rename to tests/4-opt/testcases/8_return_early.in
diff --git a/tests/4-opt/testcases/7_return_early.out b/tests/4-opt/testcases/8_return_early.out
similarity index 100%
rename from tests/4-opt/testcases/7_return_early.out
rename to tests/4-opt/testcases/8_return_early.out
diff --git a/tests/4-opt/testcases/8_licm0.cminus b/tests/4-opt/testcases/9_licm0.cminus
similarity index 100%
rename from tests/4-opt/testcases/8_licm0.cminus
rename to tests/4-opt/testcases/9_licm0.cminus
diff --git a/tests/4-opt/testcases/8_licm0.in b/tests/4-opt/testcases/9_licm0.in
similarity index 100%
rename from tests/4-opt/testcases/8_licm0.in
rename to tests/4-opt/testcases/9_licm0.in
diff --git a/tests/4-opt/testcases/8_licm0.out b/tests/4-opt/testcases/9_licm0.out
similarity index 100%
rename from tests/4-opt/testcases/8_licm0.out
rename to tests/4-opt/testcases/9_licm0.out