diff --git a/score/launch_manager/BUILD b/score/launch_manager/BUILD
index d6eda34ae..405337a89 100644
--- a/score/launch_manager/BUILD
+++ b/score/launch_manager/BUILD
@@ -11,6 +11,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -70,7 +71,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "exec_error_domain_UT",
     srcs = ["src/exec_error_domain_UT.cpp"],
     visibility = ["//visibility:private"],
diff --git a/score/launch_manager/src/alive/src/details/BUILD b/score/launch_manager/src/alive/src/details/BUILD
index d0f15b16d..a5bb24a9e 100644
--- a/score/launch_manager/src/alive/src/details/BUILD
+++ b/score/launch_manager/src/alive/src/details/BUILD
@@ -11,8 +11,9 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
-cc_test(
+lm_cc_test(
     name = "AliveImpl_UT",
     srcs = ["AliveImpl_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/daemon/src/alive_monitor/details/ifappl/BUILD b/score/launch_manager/src/daemon/src/alive_monitor/details/ifappl/BUILD
index 1728f5a8c..485c65ce0 100644
--- a/score/launch_manager/src/daemon/src/alive_monitor/details/ifappl/BUILD
+++ b/score/launch_manager/src/daemon/src/alive_monitor/details/ifappl/BUILD
@@ -11,6 +11,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "data_structures",
@@ -56,7 +57,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "MonitorIfDaemon_UT",
     srcs = [
         "MonitorIfDaemon_UT.cpp",
diff --git a/score/launch_manager/src/daemon/src/alive_monitor/details/supervision/BUILD b/score/launch_manager/src/daemon/src/alive_monitor/details/supervision/BUILD
index d1419f637..d28ff611d 100644
--- a/score/launch_manager/src/daemon/src/alive_monitor/details/supervision/BUILD
+++ b/score/launch_manager/src/daemon/src/alive_monitor/details/supervision/BUILD
@@ -11,6 +11,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "supervision_cfg",
@@ -57,7 +58,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "Alive_UT",
     srcs = ["Alive_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/daemon/src/common/BUILD b/score/launch_manager/src/daemon/src/common/BUILD
index 2aac5cfa1..f261c65d6 100644
--- a/score/launch_manager/src/daemon/src/common/BUILD
+++ b/score/launch_manager/src/daemon/src/common/BUILD
@@ -10,7 +10,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
-load("@rules_cc//cc:defs.bzl", "cc_test")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "identifier_hash",
@@ -25,7 +25,7 @@ cc_library(
     visibility = ["//score:__subpackages__"],
 )
 
-cc_test(
+lm_cc_test(
     name = "identifier_hash_UT",
     srcs = ["identifier_hash_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/daemon/src/common/concurrency/BUILD b/score/launch_manager/src/daemon/src/common/concurrency/BUILD
index efecb3822..434901d4f 100644
--- a/score/launch_manager/src/daemon/src/common/concurrency/BUILD
+++ b/score/launch_manager/src/daemon/src/common/concurrency/BUILD
@@ -10,7 +10,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "workerthread",
@@ -38,7 +39,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "fixed_size_queue_test",
     srcs = ["fixed_size_queue_test.cpp"],
     visibility = ["//tests:__subpackages__"],
@@ -96,7 +97,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "mpsc_bounded_queue_test",
     srcs = ["mpsc_bounded_queue_test.cpp"],
     visibility = ["//tests:__subpackages__"],
@@ -106,7 +107,7 @@ cc_test(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "mpsc_bounded_queue_tsan_test",
     srcs = ["mpsc_bounded_queue_test.cpp"],
     copts = [
@@ -127,7 +128,7 @@ cc_test(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "mpmc_concurrent_queue_test",
     srcs = ["mpmc_concurrent_queue_test.cpp"],
     visibility = ["//tests:__subpackages__"],
@@ -137,7 +138,7 @@ cc_test(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "mpmc_concurrent_queue_helgrind_test",
     srcs = ["mpmc_concurrent_queue_test.cpp"],
     data = ["mpmc_concurrent_queue_test_helgrind.supp"],
@@ -151,7 +152,7 @@ cc_test(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "mpmc_concurrent_queue_tsan_test",
     srcs = ["mpmc_concurrent_queue_test.cpp"],
     copts = [
diff --git a/score/launch_manager/src/daemon/src/configuration/BUILD b/score/launch_manager/src/daemon/src/configuration/BUILD
index 8d6fe7eb3..9116bdbb7 100644
--- a/score/launch_manager/src/daemon/src/configuration/BUILD
+++ b/score/launch_manager/src/daemon/src/configuration/BUILD
@@ -12,6 +12,7 @@
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
 load("@score_baselibs//score/flatbuffers/bazel:codegen.bzl", "generate_cpp")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 filegroup(
     name = "new_lm_flatcfg_fbs",
@@ -35,7 +36,7 @@ cc_library(
     deps = ["@score_baselibs//score/language/futurecpp"],
 )
 
-cc_test(
+lm_cc_test(
     name = "config_UT",
     srcs = ["details/config_UT.cpp"],
     visibility = ["//score:__subpackages__"],
@@ -94,7 +95,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "flatbuffer_type_converters_UT",
     srcs = ["details/flatbuffer_type_converters_UT.cpp"],
     visibility = ["//tests:__subpackages__"],
@@ -105,7 +106,7 @@ cc_test(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "flatbuffer_config_loader_UT",
     srcs = ["details/flatbuffer_config_loader_UT.cpp"],
     visibility = ["//tests:__subpackages__"],
@@ -159,7 +160,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "configuration_adapter_UT",
     srcs = ["configuration_adapter_UT.cpp"],
     visibility = ["//tests:__subpackages__"],
diff --git a/score/launch_manager/src/daemon/src/process_group_manager/details/BUILD b/score/launch_manager/src/daemon/src/process_group_manager/details/BUILD
index 2bc35491f..62c60af95 100644
--- a/score/launch_manager/src/daemon/src/process_group_manager/details/BUILD
+++ b/score/launch_manager/src/daemon/src/process_group_manager/details/BUILD
@@ -11,6 +11,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "process_info_node",
@@ -67,7 +68,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "safeprocessmap_UT",
     timeout = "long",
     srcs = ["safeprocessmap_UT.cpp"],
@@ -92,7 +93,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "oshandler_UT",
     srcs = ["oshandler_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/daemon/src/process_state_client/BUILD b/score/launch_manager/src/daemon/src/process_state_client/BUILD
index 223b38670..25838e161 100644
--- a/score/launch_manager/src/daemon/src/process_state_client/BUILD
+++ b/score/launch_manager/src/daemon/src/process_state_client/BUILD
@@ -10,7 +10,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "posix_process",
@@ -72,7 +73,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "process_state_client_ut",
     srcs = ["process_state_client_ut.cpp"],
     tags = ["no-tsan"],
diff --git a/score/launch_manager/src/daemon/src/recovery_client/BUILD b/score/launch_manager/src/daemon/src/recovery_client/BUILD
index 0944da271..bea6bd7b7 100644
--- a/score/launch_manager/src/daemon/src/recovery_client/BUILD
+++ b/score/launch_manager/src/daemon/src/recovery_client/BUILD
@@ -10,7 +10,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "recovery_client",
@@ -32,7 +33,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "recovery_client_UT",
     srcs = ["recovery_client_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/lifecycle_client/BUILD b/score/launch_manager/src/lifecycle_client/BUILD
index 72a9c9cc7..7dc47b33a 100644
--- a/score/launch_manager/src/lifecycle_client/BUILD
+++ b/score/launch_manager/src/lifecycle_client/BUILD
@@ -12,6 +12,7 @@
 # *******************************************************************************
 load("@rules_cc//cc:defs.bzl", "cc_library")
 load("@score_baselibs//score/language/safecpp:toolchain_features.bzl", "COMPILER_WARNING_FEATURES")
+load("//tests/utils/bazel:unit_test.bzl", "lm_cc_test")
 
 cc_library(
     name = "lifecycle_client",
@@ -209,7 +210,7 @@ cc_library(
     ],
 )
 
-cc_test(
+lm_cc_test(
     name = "runapplication_UT",
     srcs = ["src/runapplication_UT.cpp"],
     deps = [
diff --git a/score/launch_manager/src/testing/BUILD b/score/launch_manager/src/testing/BUILD
new file mode 100644
index 000000000..23a30a96b
--- /dev/null
+++ b/score/launch_manager/src/testing/BUILD
@@ -0,0 +1,25 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "testing_assertion_handler",
+    testonly = True,
+    srcs = ["assertion_handler.cpp"],
+    hdrs = ["assertion_handler.hpp"],
+    include_prefix = "score/mw/launch_manager/testing",
+    strip_include_prefix = "/score/launch_manager/src/testing",
+    visibility = ["//score/launch_manager:__subpackages__"],
+    deps = ["@score_baselibs//score/language/futurecpp"],
+    alwayslink = True,
+)
diff --git a/score/launch_manager/src/testing/assertion_handler.cpp b/score/launch_manager/src/testing/assertion_handler.cpp
new file mode 100644
index 000000000..541c7ba73
--- /dev/null
+++ b/score/launch_manager/src/testing/assertion_handler.cpp
@@ -0,0 +1,27 @@
+/********************************************************************************
+ * Copyright (c) 2026 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ********************************************************************************/
+
+#include "score/mw/launch_manager/testing/assertion_handler.hpp"
+
+namespace
+{
+
+// Registers the assertion handler at static-initialization time so every unit
+// test binary that links this library gets diagnostic output on assertion failure
+// without any explicit setup call.
+const bool kAssertionHandlerRegistered = []() noexcept {
+    score::lcm::testing::registerAssertionHandler();
+    return true;
+}();
+
+}  // namespace
diff --git a/score/launch_manager/src/testing/assertion_handler.hpp b/score/launch_manager/src/testing/assertion_handler.hpp
new file mode 100644
index 000000000..f65429837
--- /dev/null
+++ b/score/launch_manager/src/testing/assertion_handler.hpp
@@ -0,0 +1,40 @@
+/********************************************************************************
+ * Copyright (c) 2026 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ********************************************************************************/
+
+#pragma once
+
+#include <score/assert.hpp>
+
+#include <iostream>
+#include <sstream>
+
+namespace score::lcm::testing
+{
+
+inline void registerAssertionHandler() noexcept
+{
+    score::cpp::set_assertion_handler([](const score::cpp::handler_parameters& params) {
+        std::ostringstream msg;
+        msg << "Assertion failed: " << (params.condition != nullptr ? params.condition : "")
+            << "\n  Location: " << (params.file != nullptr ? params.file : "?") << ":" << params.line
+            << " (" << (params.function != nullptr ? params.function : "?") << ")";
+        if (params.message != nullptr)
+        {
+            msg << "\n  Message:  " << params.message;
+        }
+        msg << "\n";
+        std::cerr << msg.str();
+    });
+}
+
+}  // namespace score::lcm::testing
diff --git a/tests/utils/bazel/unit_test.bzl b/tests/utils/bazel/unit_test.bzl
new file mode 100644
index 000000000..3d4990523
--- /dev/null
+++ b/tests/utils/bazel/unit_test.bzl
@@ -0,0 +1,34 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+"""Bazel macros for LCM unit tests."""
+
+load("@rules_cc//cc:defs.bzl", "cc_test")
+
+def lm_cc_test(name, deps = [], **kwargs):
+    """Wrapper around cc_test that auto-registers the LCM assertion handler.
+
+    All arguments are forwarded to cc_test unchanged. The assertion handler
+    library is injected so that assertion failures in any unit test binary
+    print a diagnostic message before aborting, without requiring any
+    explicit setup call in test code.
+
+    Args:
+        name: Test target name.
+        deps: Additional dependencies (assertion handler is appended automatically).
+        **kwargs: Forwarded verbatim to cc_test.
+    """
+    cc_test(
+        name = name,
+        deps = deps + ["//score/launch_manager/src/testing:testing_assertion_handler"],
+        **kwargs
+    )