diff --git a/infra/cifuzz/cifuzz-base/Dockerfile b/infra/cifuzz/cifuzz-base/Dockerfile
index 66fd6b517..096d2b64a 100644
--- a/infra/cifuzz/cifuzz-base/Dockerfile
+++ b/infra/cifuzz/cifuzz-base/Dockerfile
@@ -40,6 +40,8 @@ RUN python3 -m pip install -r /tmp/requirements.txt && rm /tmp/requirements.txt
 ADD . ${OSS_FUZZ_ROOT}
 RUN npm install ${OSS_FUZZ_ROOT}/infra/cifuzz
 
+ENV PYTHONUNBUFFERED=1
+
 # Python file to execute when the docker container starts up.
 # We can't use the env var $OSS_FUZZ_ROOT here. Since it's a constant env var,
 # just expand to '/opt/oss-fuzz'.
diff --git a/infra/cifuzz/fuzz_target.py b/infra/cifuzz/fuzz_target.py
index 8c62a64ab..27b969d38 100644
--- a/infra/cifuzz/fuzz_target.py
+++ b/infra/cifuzz/fuzz_target.py
@@ -177,8 +177,7 @@ class FuzzTarget:  # pylint: disable=too-many-instance-attributes
 
       # Only report first crash.
       crash = result.crashes[0]
-      logging.info('Fuzzer: %s. Detected bug:\n%s', self.target_name,
-                   crash.stacktrace)
+      logging.info('Fuzzer: %s. Detected bug.', self.target_name)
 
       if self.is_crash_reportable(crash.input_path):
         # We found a bug in the fuzz target and we will report it.