diff --git a/crates/blockifier/src/state/contract_class_manager.rs b/crates/blockifier/src/state/contract_class_manager.rs
index cc10a40b71..46693b3abc 100644
--- a/crates/blockifier/src/state/contract_class_manager.rs
+++ b/crates/blockifier/src/state/contract_class_manager.rs
@@ -29,6 +29,9 @@ use crate::state::global_cache::CachedCairoNative;
 use crate::state::global_cache::{CachedCasm, ContractCaches};
 pub const DEFAULT_COMPILATION_REQUEST_CHANNEL_SIZE: usize = 2000;
 
+#[cfg(all(test, feature = "cairo_native"))]
+#[path = "contract_class_manager_test.rs"]
+mod contract_class_manager_test;
 /// Represents a request to compile a sierra contract class to a native compiled class.
 ///
 /// # Fields:
diff --git a/crates/blockifier/src/state/contract_class_manager_test.rs b/crates/blockifier/src/state/contract_class_manager_test.rs
new file mode 100644
index 0000000000..581cdccf0d
--- /dev/null
+++ b/crates/blockifier/src/state/contract_class_manager_test.rs
@@ -0,0 +1,93 @@
+use std::sync::mpsc::sync_channel;
+use std::sync::Arc;
+
+use rstest::rstest;
+
+use crate::blockifier::config::CairoNativeRunConfig;
+use crate::execution::contract_class::{CompiledClassV1, RunnableCompiledClass};
+use crate::state::contract_class_manager::{CompilationRequest, ContractClassManager};
+use crate::state::global_cache::{ContractCaches, GLOBAL_CONTRACT_CACHE_SIZE_FOR_TEST};
+use crate::test_utils::contracts::FeatureContract;
+use crate::test_utils::{CairoVersion, RunnableCairo1};
+
+const TEST_CHANNEL_SIZE: usize = 10;
+
+fn get_casm(test_contract: FeatureContract) -> CompiledClassV1 {
+    match test_contract.get_runnable_class() {
+        RunnableCompiledClass::V1(casm) => casm,
+        _ => panic!("Expected CompiledClassV1"),
+    }
+}
+
+fn create_test_request_from_contract(test_contract: FeatureContract) -> CompilationRequest {
+    let class_hash = test_contract.get_class_hash();
+    let sierra = Arc::new(test_contract.get_sierra());
+    let casm = get_casm(test_contract);
+
+    (class_hash, sierra, casm)
+}
+
+fn create_test_request() -> CompilationRequest {
+    let test_contract = FeatureContract::TestContract(CairoVersion::Cairo1(RunnableCairo1::Casm));
+    create_test_request_from_contract(test_contract)
+}
+
+#[rstest]
+#[case::run_native_while_waiting(true, true)]
+#[case::run_native_without_waiting(true, false)]
+#[case::run_without_native(false, false)]
+fn test_start(#[case] run_cairo_native: bool, #[case] wait_on_native_compilation: bool) {
+    let native_config =
+        CairoNativeRunConfig { run_cairo_native, wait_on_native_compilation, ..Default::default() };
+    let manager = ContractClassManager::create_for_testing(native_config);
+
+    assert_eq!(manager.cairo_native_run_config, native_config);
+    if run_cairo_native {
+        if wait_on_native_compilation {
+            assert!(
+                manager.sender.is_none(),
+                "Sender should be None - the compilation worker is not used."
+            );
+            assert!(
+                manager.compiler.is_some(),
+                "Compiler should be Some - compilation is not offloaded to the compilation worker."
+            );
+        } else {
+            assert!(
+                manager.sender.is_some(),
+                "Sender should be Some - the compilation worker is used."
+            );
+            assert!(
+                manager.compiler.is_none(),
+                "Compiler should be None - compilation is offloaded to the compilation worker."
+            );
+        }
+    } else {
+        assert!(manager.sender.is_none(), "Sender should be None- Cairo native is disabled.");
+        assert!(manager.compiler.is_none(), "Compiler should be None - Cairo native is disabled.");
+    }
+}
+
+#[test]
+#[should_panic(expected = "Compilation request channel is closed.")]
+fn test_send_compilation_request_channel_disconnected() {
+    // We use the channel to send native compilation requests.
+    let native_config = CairoNativeRunConfig {
+        run_cairo_native: true,
+        wait_on_native_compilation: false,
+        channel_size: TEST_CHANNEL_SIZE,
+    };
+    let (sender, receiver) = sync_channel(native_config.channel_size);
+    let manager = ContractClassManager {
+        cairo_native_run_config: native_config,
+        contract_caches: ContractCaches::new(GLOBAL_CONTRACT_CACHE_SIZE_FOR_TEST),
+        sender: Some(sender),
+        compiler: None,
+    };
+    // Disconnect the channel by dropping the receiver.
+    drop(receiver);
+
+    // Sending request with a disconnected channel should panic.
+    let request = create_test_request();
+    manager.send_compilation_request(request);
+}
diff --git a/crates/blockifier/src/state/global_cache.rs b/crates/blockifier/src/state/global_cache.rs
index 2f06c3a0e2..4394a93273 100644
--- a/crates/blockifier/src/state/global_cache.rs
+++ b/crates/blockifier/src/state/global_cache.rs
@@ -31,6 +31,7 @@ impl CachedCasm {
 
 #[cfg(feature = "cairo_native")]
 #[derive(Debug, Clone)]
+#[cfg_attr(test, derive(PartialEq))]
 pub enum CachedCairoNative {
     Compiled(NativeCompiledClassV1),
     CompilationFailed,
diff --git a/crates/blockifier/src/test_utils/struct_impls.rs b/crates/blockifier/src/test_utils/struct_impls.rs
index cb30891033..2caaaee143 100644
--- a/crates/blockifier/src/test_utils/struct_impls.rs
+++ b/crates/blockifier/src/test_utils/struct_impls.rs
@@ -19,6 +19,7 @@ use starknet_api::deprecated_contract_class::ContractClass as DeprecatedContract
 use starknet_api::execution_resources::GasAmount;
 use starknet_api::test_utils::{TEST_ERC20_CONTRACT_ADDRESS, TEST_ERC20_CONTRACT_ADDRESS2};
 
+use crate::blockifier::config::{CairoNativeRunConfig, ContractClassManagerConfig};
 use crate::bouncer::{BouncerConfig, BouncerWeights, BuiltinCount};
 use crate::context::{BlockContext, ChainInfo, FeeTokenAddresses, TransactionContext};
 use crate::execution::call_info::{CallExecution, CallInfo, Retdata};
@@ -33,6 +34,7 @@ use crate::execution::entry_point::{
 };
 #[cfg(feature = "cairo_native")]
 use crate::execution::native::contract_class::NativeCompiledClassV1;
+use crate::state::contract_class_manager::ContractClassManager;
 use crate::state::state_api::State;
 use crate::test_utils::{get_raw_contract_class, update_json_value};
 use crate::transaction::objects::{
@@ -182,6 +184,15 @@ impl CallExecution {
     }
 }
 
+impl ContractClassManager {
+    pub fn create_for_testing(native_config: CairoNativeRunConfig) -> Self {
+        let config = ContractClassManagerConfig {
+            cairo_native_run_config: native_config,
+            ..Default::default()
+        };
+        ContractClassManager::start(config)
+    }
+}
 // Contract loaders.
 
 // TODO(Noa): Consider using PathBuf.