diff --git a/Cargo.lock b/Cargo.lock
index 0e31451f5..fed8172d0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5373,6 +5373,7 @@ dependencies = [
  "parity-scale-codec",
  "scale-info",
  "security",
+ "serial_test",
  "sp-arithmetic",
  "sp-core",
  "sp-io",
diff --git a/pallets/oracle/Cargo.toml b/pallets/oracle/Cargo.toml
index 74ce13a2e..ad89df7b6 100644
--- a/pallets/oracle/Cargo.toml
+++ b/pallets/oracle/Cargo.toml
@@ -46,6 +46,7 @@ orml-currencies = { git = "https://github.com/open-web3-stack/open-runtime-modul
 orml-tokens = { git = "https://github.com/open-web3-stack/open-runtime-module-library", branch = "polkadot-v0.9.40", default-features = false }
 orml-traits = { git = "https://github.com/open-web3-stack/open-runtime-module-library", branch = "polkadot-v0.9.40", default-features = false }
 
+serial_test = "0.9.0"
 
 [features]
 default = ["std"]
diff --git a/pallets/oracle/src/lib.rs b/pallets/oracle/src/lib.rs
index cf426e48f..4a1533cb2 100644
--- a/pallets/oracle/src/lib.rs
+++ b/pallets/oracle/src/lib.rs
@@ -37,7 +37,6 @@ mod default_weights;
 #[cfg_attr(test, cfg(feature = "testing-utils"))]
 mod tests;
 
-use crate::oracle_mock::DataFeederExtended;
 #[cfg(feature = "testing-utils")]
 pub use dia_oracle::{CoinInfo, DiaOracle, PriceInfo};
 #[cfg(feature = "testing-utils")]
@@ -257,6 +256,7 @@ impl<T: Config> Pallet<T> {
 	// public only for testing purposes
 	#[cfg(feature = "testing-utils")]
 	pub fn _clear_values() -> DispatchResult {
+		use crate::oracle_mock::DataFeederExtended;
 		T::DataFeedProvider::clear_all_values()
 	}
 
diff --git a/pallets/oracle/src/mock.rs b/pallets/oracle/src/mock.rs
index f8cc0ef25..ae4b15fb4 100644
--- a/pallets/oracle/src/mock.rs
+++ b/pallets/oracle/src/mock.rs
@@ -243,6 +243,7 @@ where
 	T: FnOnce(),
 {
 	clear_mocks();
+	let _ = Oracle::_clear_values();
 	ExtBuilder::build().execute_with(|| {
 		Security::set_active_block_number(1);
 		System::set_block_number(1);
diff --git a/pallets/oracle/src/tests.rs b/pallets/oracle/src/tests.rs
index 9f094fa26..2bd14d83e 100644
--- a/pallets/oracle/src/tests.rs
+++ b/pallets/oracle/src/tests.rs
@@ -1,6 +1,7 @@
 use crate::{mock::*, CurrencyId, OracleKey};
 use frame_support::{assert_err, assert_ok};
 use mocktopus::mocking::*;
+use serial_test::serial;
 use sp_arithmetic::FixedU128;
 use sp_runtime::FixedPointNumber;
 
@@ -9,6 +10,7 @@ fn mine_block() {
 }
 
 #[test]
+#[serial]
 fn feed_values_succeeds() {
 	run_test(|| {
 		let key = OracleKey::ExchangeRate(CurrencyId::AlphaNum4(
@@ -63,6 +65,7 @@ mod oracle_offline_detection {
 	}
 
 	#[test]
+	#[serial]
 	fn basic_oracle_offline_logic() {
 		run_test(|| {
 			Oracle::get_max_delay.mock_safe(move || MockResult::Return(10));
@@ -106,6 +109,7 @@ mod oracle_offline_detection {
 	}
 
 	#[test]
+	#[serial]
 	fn oracle_offline_logic_with_multiple_oracles() {
 		run_test(|| {
 			Oracle::get_max_delay.mock_safe(move || MockResult::Return(10));
@@ -145,8 +149,11 @@ mod oracle_offline_detection {
 }
 
 #[test]
+#[serial]
 fn getting_exchange_rate_fails_with_missing_exchange_rate() {
 	run_test(|| {
+		let _ = Oracle::_clear_values();
+
 		let key = OracleKey::ExchangeRate(CurrencyId::XCM(0));
 		assert_err!(Oracle::get_price(key), TestError::MissingExchangeRate);
 		assert_err!(Oracle::currency_to_usd(0, CurrencyId::XCM(0)), TestError::MissingExchangeRate);
@@ -155,6 +162,7 @@ fn getting_exchange_rate_fails_with_missing_exchange_rate() {
 }
 
 #[test]
+#[serial]
 fn currency_to_usd() {
 	run_test(|| {
 		Oracle::get_price
@@ -168,6 +176,7 @@ fn currency_to_usd() {
 }
 
 #[test]
+#[serial]
 fn usd_to_currency() {
 	run_test(|| {
 		Oracle::get_price
@@ -181,6 +190,7 @@ fn usd_to_currency() {
 }
 
 #[test]
+#[serial]
 fn test_is_invalidated() {
 	run_test(|| {
 		let now = 1585776145;
@@ -203,6 +213,7 @@ fn test_is_invalidated() {
 }
 
 #[test]
+#[serial]
 fn begin_block_set_oracle_offline_succeeds() {
 	run_test(|| unsafe {
 		let mut oracle_reported = false;