diff --git a/mlonmcu/cli/common.py b/mlonmcu/cli/common.py
index 429cccdd8..963f58474 100644
--- a/mlonmcu/cli/common.py
+++ b/mlonmcu/cli/common.py
@@ -17,6 +17,7 @@
 # limitations under the License.
 #
 import os
+import sys
 import multiprocessing
 import logging
 from mlonmcu.target import SUPPORTED_TARGETS
@@ -27,6 +28,10 @@
 from mlonmcu.logging import get_logger, set_log_level
 from .helper.parse import extract_config
 
+from mlonmcu.logging import get_logger
+
+logger = get_logger()
+
 
 def handle_logging_flags(args):
     if hasattr(args, "verbose") and hasattr(args, "quiet"):
@@ -186,7 +191,7 @@ def kickoff_runs(args, until, context):
         per_stage = bool(config["runs_per_stage"])
     elif "runs_per_stage" in context.environment.vars:
         per_stage = bool(context.environment.vars["runs_per_stage"])
-    session.process_runs(
+    success = session.process_runs(
         until=until,
         per_stage=per_stage,
         num_workers=args.parallel,
@@ -194,3 +199,6 @@ def kickoff_runs(args, until, context):
         context=context,
         export=True,
     )
+    if not success:
+        logger.error("At least one error occured!")
+        sys.exit(1)
diff --git a/mlonmcu/context.py b/mlonmcu/context.py
index d866ef154..5c954b447 100644
--- a/mlonmcu/context.py
+++ b/mlonmcu/context.py
@@ -40,7 +40,6 @@
 
 logger = get_logger()
 
-
 def lookup_environment() -> Environment:
     """Helper function to automatically find a suitable environment.
 
diff --git a/mlonmcu/session/run.py b/mlonmcu/session/run.py
index 9070c4637..022dfed68 100644
--- a/mlonmcu/session/run.py
+++ b/mlonmcu/session/run.py
@@ -622,6 +622,9 @@ def get_report(self):
         post["Config"] = self.get_all_configs(omit_paths=True, omit_defaults=True, omit_globals=True)
         post["Postprocesses"] = self.get_all_postprocess_names()
         post["Comment"] = self.comment if len(self.comment) > 0 else "-"
+        if self.failing:
+            post["Failing"] = True
+
         self.export_stage(RunStage.RUN, optional=self.export_optional)
 
         metrics = Metrics()
diff --git a/mlonmcu/session/session.py b/mlonmcu/session/session.py
index ed76ea637..e3dbe06c2 100644
--- a/mlonmcu/session/session.py
+++ b/mlonmcu/session/session.py
@@ -275,7 +275,7 @@ def _used_stages(runs, until):
                 results = _join_workers(workers)
         if num_failures == 0:
             logger.info("All runs completed successfuly!")
-        elif num_failures == 0:
+        elif num_failures == num_runs:
             logger.error("All runs have failed to complete!")
         else:
             num_success = num_runs - num_failures
@@ -315,6 +315,8 @@ def _used_stages(runs, until):
         if print_report:
             logger.info("Report:\n" + str(report.df))
 
+        return num_failures == 0
+
     def __repr__(self):
         return f"Session(idx={self.idx},status={self.status},runs={self.runs})"