diff --git a/.github/actions/clang_format/action.yml b/.github/actions/clang_format/action.yml
index 7763115a8..f49774bfc 100644
--- a/.github/actions/clang_format/action.yml
+++ b/.github/actions/clang_format/action.yml
@@ -18,6 +18,8 @@ runs:
       shell: bash
 
     - name: Run formatter
+      continue-on-error: true
+      id: run_formatter
       run: |
         ./.githooks/pre-commit
       shell: bash
@@ -27,3 +29,8 @@ runs:
       shell: bash
       run: |
         git diff --color --exit-code | tee "clang-format.patch"
+
+    - name: Fail job
+      if: ${{ steps.run_formatter.outcome != 'success' }}
+      shell: bash
+      run: exit 1
diff --git a/unittests/data/cassandra/impl/FakesAndMocks.h b/unittests/data/cassandra/impl/FakesAndMocks.h
index cb22cb5ab..31df196c8 100644
--- a/unittests/data/cassandra/impl/FakesAndMocks.h
+++ b/unittests/data/cassandra/impl/FakesAndMocks.h
@@ -43,8 +43,8 @@ struct FakeResultOrError {
         return err;
     }
 
-    FakeResult
-    value() const
+    static FakeResult
+    value()
     {
         return FakeResult{};
     }
@@ -65,8 +65,8 @@ struct FakeFuture {
         return data;
     }
 
-    FakeMaybeError
-    await() const
+    static FakeMaybeError
+    await()
     {
         return {};
     }
@@ -103,14 +103,14 @@ struct MockHandle {
 struct FakeRetryPolicy {
     FakeRetryPolicy(boost::asio::io_context&){};  // required by concept
 
-    std::chrono::milliseconds
+    static std::chrono::milliseconds
     calculateDelay(uint32_t /* attempt */)
     {
         return std::chrono::milliseconds{1};
     }
 
-    bool
-    shouldRetry(CassandraError) const
+    static bool
+    shouldRetry(CassandraError)
     {
         return false;
     }
diff --git a/unittests/rpc/handlers/impl/FakesAndMocks.h b/unittests/rpc/handlers/impl/FakesAndMocks.h
index be28fe14e..2f3c4817f 100644
--- a/unittests/rpc/handlers/impl/FakesAndMocks.h
+++ b/unittests/rpc/handlers/impl/FakesAndMocks.h
@@ -70,8 +70,8 @@ class HandlerFake {
     using Output = TestOutput;
     using Result = rpc::HandlerReturnType<Output>;
 
-    rpc::RpcSpecConstRef
-    spec([[maybe_unused]] uint32_t apiVersion) const
+    static rpc::RpcSpecConstRef
+    spec([[maybe_unused]] uint32_t apiVersion)
     {
         using namespace rpc::validation;
 
@@ -83,8 +83,8 @@ class HandlerFake {
         return rpcSpec;
     }
 
-    Result
-    process(Input input, [[maybe_unused]] rpc::Context const& ctx) const
+    static Result
+    process(Input input, [[maybe_unused]] rpc::Context const& ctx)
     {
         return Output{input.hello + '_' + std::to_string(input.limit.value_or(0))};
     }
@@ -95,8 +95,8 @@ class NoInputHandlerFake {
     using Output = TestOutput;
     using Result = rpc::HandlerReturnType<Output>;
 
-    Result
-    process([[maybe_unused]] rpc::Context const& ctx) const
+    static Result
+    process([[maybe_unused]] rpc::Context const& ctx)
     {
         return Output{"test"};
     }
@@ -109,8 +109,8 @@ class FailingHandlerFake {
     using Output = TestOutput;
     using Result = rpc::HandlerReturnType<Output>;
 
-    rpc::RpcSpecConstRef
-    spec([[maybe_unused]] uint32_t apiVersion) const
+    static rpc::RpcSpecConstRef
+    spec([[maybe_unused]] uint32_t apiVersion)
     {
         using namespace rpc::validation;
 
@@ -122,8 +122,8 @@ class FailingHandlerFake {
         return rpcSpec;
     }
 
-    Result
-    process([[maybe_unused]] Input input, [[maybe_unused]] rpc::Context const& ctx) const
+    static Result
+    process([[maybe_unused]] Input input, [[maybe_unused]] rpc::Context const& ctx)
     {
         // always fail
         return rpc::Error{rpc::Status{"Very custom error"}};
diff --git a/unittests/util/FakeAmendmentBlockAction.h b/unittests/util/FakeAmendmentBlockAction.h
index d49fec5f6..639f9f7b2 100644
--- a/unittests/util/FakeAmendmentBlockAction.h
+++ b/unittests/util/FakeAmendmentBlockAction.h
@@ -25,7 +25,7 @@ struct FakeAmendmentBlockAction {
     std::reference_wrapper<std::size_t> callCount;
 
     void
-    operator()()
+    operator()() const
     {
         ++(callCount.get());
     }
diff --git a/unittests/util/FakeFetchResponse.h b/unittests/util/FakeFetchResponse.h
index d6d0d675e..12a5fd3ec 100644
--- a/unittests/util/FakeFetchResponse.h
+++ b/unittests/util/FakeFetchResponse.h
@@ -21,6 +21,7 @@
 
 #include <cstddef>
 #include <string>
+#include <utility>
 #include <vector>
 
 class FakeBook {
@@ -135,7 +136,7 @@ class FakeTransactionsList {
 
 public:
     std::size_t
-    transactions_size()
+    transactions_size() const
     {
         return size_;
     }
@@ -146,7 +147,7 @@ class FakeObjectsList {
 
 public:
     std::size_t
-    objects_size()
+    objects_size() const
     {
         return size_;
     }
@@ -165,7 +166,7 @@ struct FakeFetchResponse {
     }
 
     FakeFetchResponse(std::string blob, uint32_t id = 0, bool objectNeighborsIncluded = false)
-        : id{id}, objectNeighborsIncluded{objectNeighborsIncluded}, ledgerHeader{blob}
+        : id{id}, objectNeighborsIncluded{objectNeighborsIncluded}, ledgerHeader{std::move(blob)}
     {
     }
 
@@ -175,14 +176,14 @@ struct FakeFetchResponse {
         return other.id == id;
     }
 
-    FakeTransactionsList
-    transactions_list() const
+    static FakeTransactionsList
+    transactions_list()
     {
         return {};
     }
 
-    FakeObjectsList
-    ledger_objects() const
+    static FakeObjectsList
+    ledger_objects()
     {
         return {};
     }
diff --git a/unittests/util/Fixtures.h b/unittests/util/Fixtures.h
index cc1cd31b6..6cbb9b264 100644
--- a/unittests/util/Fixtures.h
+++ b/unittests/util/Fixtures.h
@@ -19,6 +19,7 @@
 
 #pragma once
 
+#include "data/BackendInterface.h"
 #include "util/MockBackend.h"
 #include "util/MockCounters.h"
 #include "util/MockETLService.h"
@@ -26,10 +27,24 @@
 #include "util/MockSubscriptionManager.h"
 #include "util/log/Logger.h"
 
-#include <boost/asio.hpp>
+#include <boost/asio/executor_work_guard.hpp>
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/spawn.hpp>
+#include <boost/log/core/core.hpp>
+#include <boost/log/expressions/predicates/channel_severity_filter.hpp>
+#include <boost/log/keywords/format.hpp>
+#include <boost/log/utility/setup/common_attributes.hpp>
+#include <boost/log/utility/setup/console.hpp>
+#include <boost/log/utility/setup/formatter_parser.hpp>
 #include <gtest/gtest.h>
 
+#include <memory>
 #include <mutex>
+#include <optional>
+#include <ostream>
+#include <sstream>
+#include <string>
 #include <thread>
 
 /**
@@ -181,7 +196,7 @@ struct MockBackendTest : virtual public NoLoggerFixture {
     SetUp() override
     {
         NoLoggerFixture::SetUp();
-        util::Config cfg;
+        util::Config const cfg;
         mockBackendPtr = std::make_shared<MockBackend>(cfg);
     }
     void
diff --git a/unittests/util/MockSubscriptionManager.h b/unittests/util/MockSubscriptionManager.h
index cf78d9b89..95b51886c 100644
--- a/unittests/util/MockSubscriptionManager.h
+++ b/unittests/util/MockSubscriptionManager.h
@@ -28,9 +28,7 @@
 struct MockSubscriptionManager {
 public:
     using session_ptr = std::shared_ptr<web::ConnectionBase>;
-    MockSubscriptionManager()
-    {
-    }
+    MockSubscriptionManager() = default;
 
     MOCK_METHOD(boost::json::object, subLedger, (boost::asio::yield_context, session_ptr), ());
 
diff --git a/unittests/util/MockWsBase.h b/unittests/util/MockWsBase.h
index b05f1b5c9..1919ad119 100644
--- a/unittests/util/MockWsBase.h
+++ b/unittests/util/MockWsBase.h
@@ -19,8 +19,14 @@
 
 #pragma once
 
+#include "util/Taggable.h"
 #include "web/interface/ConnectionBase.h"
 
+#include <boost/beast/http/status.hpp>
+
+#include <memory>
+#include <string>
+
 struct MockSession : public web::ConnectionBase {
     std::string message;
     void
@@ -30,6 +36,7 @@ struct MockSession : public web::ConnectionBase {
     }
 
     void
+    // NOLINTNEXTLINE(cppcoreguidelines-rvalue-reference-param-not-moved)
     send(std::string&& msg, boost::beast::http::status = boost::beast::http::status::ok) override
     {
         message += msg;
@@ -49,6 +56,7 @@ struct MockDeadSession : public web::ConnectionBase {
     }
 
     void
+    // NOLINTNEXTLINE(cppcoreguidelines-rvalue-reference-param-not-moved)
     send(std::string&&, boost::beast::http::status = boost::beast::http::status::ok) override
     {
     }
diff --git a/unittests/util/TestHttpSyncClient.h b/unittests/util/TestHttpSyncClient.h
index 6e377a617..37173c6f5 100644
--- a/unittests/util/TestHttpSyncClient.h
+++ b/unittests/util/TestHttpSyncClient.h
@@ -19,12 +19,36 @@
 
 #pragma once
 
-#include <boost/asio.hpp>
-#include <boost/beast.hpp>
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/asio/ssl/context.hpp>
+#include <boost/asio/ssl/error.hpp>
+#include <boost/asio/ssl/stream_base.hpp>
+#include <boost/asio/ssl/verify_context.hpp>
+#include <boost/asio/ssl/verify_mode.hpp>
+#include <boost/beast/core/buffers_to_string.hpp>
+#include <boost/beast/core/error.hpp>
+#include <boost/beast/core/flat_buffer.hpp>
+#include <boost/beast/core/stream_traits.hpp>
+#include <boost/beast/core/tcp_stream.hpp>
 #include <boost/beast/http.hpp>
-#include <boost/beast/ssl.hpp>
-
+#include <boost/beast/http/field.hpp>
+#include <boost/beast/http/message.hpp>
+#include <boost/beast/http/string_body.hpp>
+#include <boost/beast/http/verb.hpp>
+#include <boost/beast/ssl/ssl_stream.hpp>
+#include <boost/beast/version.hpp>
+#include <boost/beast/websocket/rfc6455.hpp>
+#include <boost/beast/websocket/stream.hpp>
+#include <boost/beast/websocket/stream_base.hpp>
+#include <openssl/err.h>
+#include <openssl/tls1.h>
+
+#include <optional>
 #include <string>
+#include <utility>
+#include <vector>
 
 namespace http = boost::beast::http;
 namespace net = boost::asio;
@@ -126,8 +150,8 @@ class WebSocketSyncClient {
         ws_.set_option(boost::beast::websocket::stream_base::decorator([additionalHeaders = std::move(additionalHeaders
                                                                         )](boost::beast::websocket::request_type& req) {
             req.set(http::field::user_agent, std::string(BOOST_BEAST_VERSION_STRING) + " websocket-client-coro");
-            for (auto& header : additionalHeaders) {
-                req.set(header.name, std::move(header.value));
+            for (auto const& header : additionalHeaders) {
+                req.set(header.name, header.value);
             }
         }));
 
@@ -176,7 +200,7 @@ struct HttpsSyncClient {
         if (!SSL_set_tlsext_host_name(stream.native_handle(), host.c_str()))
 #pragma GCC diagnostic pop
         {
-            boost::beast::error_code ec{static_cast<int>(::ERR_get_error()), net::error::get_ssl_category()};
+            boost::beast::error_code const ec{static_cast<int>(::ERR_get_error()), net::error::get_ssl_category()};
             throw boost::beast::system_error{ec};
         }