diff --git a/test_programs/riscv_instructions/boolean_logic/comparisons.c b/test_programs/riscv_instructions/boolean_logic/comparisons.c
index f653fff..ec42461 100644
--- a/test_programs/riscv_instructions/boolean_logic/comparisons.c
+++ b/test_programs/riscv_instructions/boolean_logic/comparisons.c
@@ -9,7 +9,7 @@ int main() {
         } else if (x < y) {
             y += 1;
         } else {
-            return;
+            return 0;
         }
     }
 }
\ No newline at end of file
diff --git a/test_programs/riscv_instructions/boolean_logic/switch.c b/test_programs/riscv_instructions/boolean_logic/switch.c
index 86a181c..4ad23b2 100644
--- a/test_programs/riscv_instructions/boolean_logic/switch.c
+++ b/test_programs/riscv_instructions/boolean_logic/switch.c
@@ -1,7 +1,7 @@
 int main() {
     int x = 0;
-    switch(1) {
+    switch(x) {
         case 1: x = 1; break;
-        default: return;
+        default: return 0;
     }
 }
\ No newline at end of file
diff --git a/test_programs/riscv_instructions/jump_instructions/jump.c b/test_programs/riscv_instructions/jump_instructions/jump.c
index c4fd641..99f98b8 100644
--- a/test_programs/riscv_instructions/jump_instructions/jump.c
+++ b/test_programs/riscv_instructions/jump_instructions/jump.c
@@ -1,7 +1,8 @@
 int test() {
-    return 1;
+    return 0;
 }
 
 int main() {
     int x = test();
+    return x;
 }
\ No newline at end of file
diff --git a/test_programs/riscv_instructions/simple_arithmetics/unsigned_addition.c b/test_programs/riscv_instructions/simple_arithmetics/unsigned_addition.c
index 2881ac7..05a7829 100644
--- a/test_programs/riscv_instructions/simple_arithmetics/unsigned_addition.c
+++ b/test_programs/riscv_instructions/simple_arithmetics/unsigned_addition.c
@@ -1,5 +1,5 @@
 // EXPECTS TWO VARIABLES WITH A VALUE OF UNSIGNED 1
-void main() {
+int main() {
     unsigned int x = 0;
     unsigned int y = 1;
     x = x + y;
diff --git a/test_programs/riscv_instructions/simple_arithmetics/unsigned_division.c b/test_programs/riscv_instructions/simple_arithmetics/unsigned_division.c
index 729f889..8e71c25 100644
--- a/test_programs/riscv_instructions/simple_arithmetics/unsigned_division.c
+++ b/test_programs/riscv_instructions/simple_arithmetics/unsigned_division.c
@@ -1,5 +1,5 @@
 // Expecting two variables with a value of two
-void main() {
+int main() {
     unsigned int x = 4;
     unsigned int y = 2;
     x = x / y;
diff --git a/test_programs/riscv_instructions/simple_arithmetics/unsigned_multiplication.c b/test_programs/riscv_instructions/simple_arithmetics/unsigned_multiplication.c
index c79294d..f83e4f0 100644
--- a/test_programs/riscv_instructions/simple_arithmetics/unsigned_multiplication.c
+++ b/test_programs/riscv_instructions/simple_arithmetics/unsigned_multiplication.c
@@ -1,5 +1,5 @@
 // EXPECTS TWO VARIABLES WITH A VALUE OF UNSIGNED 2
-void main() {
+int main() {
     unsigned int x = 1;
     unsigned int y = 2;
     x = x * y;
diff --git a/test_programs/riscv_instructions/simple_arithmetics/unsigned_substraction.c b/test_programs/riscv_instructions/simple_arithmetics/unsigned_substraction.c
index dd4e09b..e2b7ec4 100644
--- a/test_programs/riscv_instructions/simple_arithmetics/unsigned_substraction.c
+++ b/test_programs/riscv_instructions/simple_arithmetics/unsigned_substraction.c
@@ -1,5 +1,5 @@
 // EXPECTS TWO VARIABLES WITH A VALUE OF UNSIGNED 1
-void main() {
+int main() {
     unsigned int x = 1;
     unsigned int y = 1;
     x = x - y;