diff --git a/listings/applications/components/src/switchable.cairo b/listings/applications/components/src/switchable.cairo
index b2ce28ea..6ed87a95 100644
--- a/listings/applications/components/src/switchable.cairo
+++ b/listings/applications/components/src/switchable.cairo
@@ -48,4 +48,31 @@ pub mod switchable_component {
 }
 // ANCHOR_END: component
 
+#[cfg(test)]
+mod tests {
+    use super::{
+        switchable_component, ISwitchable, ISwitchableDispatcher, ISwitchableDispatcherTrait
+    };
+    use starknet::{ContractAddress, syscalls::deploy_syscall, SyscallResultTrait};
+
+    // fn deploy() -> ISwitchableDispatcher {
+    //     let (contract_address, _) = deploy_syscall(
+    //         switchable_component::TEST_CLASS_HASH.try_into().unwrap(), 0, array![].span(), false
+    //     )
+    //         .unwrap_syscall();
+
+    //         ISwitchableDispatcherr { contract_address }
+    // }
+
+    type TestingState = switchable_component::ComponentState<MockContract::ContractState>;
+
+    // You can derive even `Default` on this type alias
+
+    #[test]
+    fn test_is_on() {
+        let mut result: TestingState = Default::default();
+
+        assert_eq!(result.is_on(), false);
+    }
+}
 
diff --git a/listings/applications/constant_product_amm/src/lib.cairo b/listings/applications/constant_product_amm/src/lib.cairo
index 0e88faff..a37a19db 100644
--- a/listings/applications/constant_product_amm/src/lib.cairo
+++ b/listings/applications/constant_product_amm/src/lib.cairo
@@ -1,4 +1,4 @@
-mod contracts;
+pub mod contracts;
 
 #[cfg(test)]
 mod tests;
diff --git a/listings/applications/erc20/src/token.cairo b/listings/applications/erc20/src/token.cairo
index 51660642..13066c29 100644
--- a/listings/applications/erc20/src/token.cairo
+++ b/listings/applications/erc20/src/token.cairo
@@ -249,7 +249,7 @@ mod tests {
     fn test_deploy_when_recipient_is_address_zero() {
         let recipient: ContractAddress = Zero::zero();
 
-        let (_contract_address, _) = deploy_syscall(
+        let (contract_address, _) = deploy_syscall(
             erc20::TEST_CLASS_HASH.try_into().unwrap(),
             recipient.into(),
             array![recipient.into(), token_name, decimals.into(), initial_supply, symbols].span(),
diff --git a/listings/applications/upgradeable_contract/src/tests.cairo b/listings/applications/upgradeable_contract/src/tests.cairo
index 91dfdcfb..dfff4f74 100644
--- a/listings/applications/upgradeable_contract/src/tests.cairo
+++ b/listings/applications/upgradeable_contract/src/tests.cairo
@@ -1,4 +1,4 @@
-mod tests { 
+mod tests {
     use starknet::class_hash::ClassHash;
 
     use super::super::upgradeable_contract_v0::{