diff --git a/README.adoc b/README.adoc
index c32b7fd..f09f09d 100644
--- a/README.adoc
+++ b/README.adoc
@@ -10184,7 +10184,7 @@ Testing that should be done for every functional patch.
 
 ===== Guest testing
 
-Build for all stable archs and run basic fast tests:
+Run all tests:
 
 ....
 ./build-all
@@ -10199,6 +10199,15 @@ Sources:
 * link:build-all[]
 * link:test[]
 
+Test just the kernel modules:
+
+....
+./test-kernel-modules
+echo $?
+....
+
+Source: link:test-kernel-module[]
+
 Test that the Internet works:
 
 ....
diff --git a/common.py b/common.py
index 146b1e1..61cff70 100644
--- a/common.py
+++ b/common.py
@@ -310,10 +310,19 @@ def run_cmd(
             del env[key]
     if show_cmd:
         print_cmd(cmd, cmd_file, extra_env=extra_env)
+
     # Otherwise Ctrl + C gives:
     # - ugly Python stack trace for gem5 (QEMU takes over terminal and is fine).
     # - kills Python, and that then kills GDB: https://stackoverflow.com/questions/19807134/does-python-always-raise-an-exception-if-you-do-ctrlc-when-a-subprocess-is-exec
+    sigint_old = signal.getsignal(signal.SIGINT)
     signal.signal(signal.SIGINT, signal.SIG_IGN)
+
+    # Otherwise BrokenPipeError when piping through | grep
+    # But if I do this, my terminal gets broken at the end. Why, why, why.
+    # https://stackoverflow.com/questions/14207708/ioerror-errno-32-broken-pipe-python
+    # Ignoring the exception is not enough as it prints a warning anyways.
+    #sigpipe_old = signal.getsignal(signal.SIGPIPE)
+    #signal.signal(signal.SIGPIPE, signal.SIG_DFL)
     # https://stackoverflow.com/questions/15535240/python-popen-write-to-stdout-and-log-file-simultaneously/52090802#52090802
     with subprocess.Popen(cmd, stdout=stdout, stderr=stderr, env=env, **kwargs) as proc:
         if out_file is not None:
@@ -327,7 +336,8 @@ def run_cmd(
                         logfile.write(byte)
                     else:
                         break
-    signal.signal(signal.SIGINT, signal.SIG_DFL)
+    signal.signal(signal.SIGINT, sigint_old)
+    #signal.signal(signal.SIGPIPE, sigpipe_old)
     return proc.returncode
 
 def setup(parser, **extra_args):
diff --git a/run b/run
index 873a14a..c9cc0f6 100755
--- a/run
+++ b/run
@@ -105,9 +105,7 @@ def main(args, extra_args=None):
                 raise_rootfs_not_found()
             common.raw_to_qcow2(prebuilt=args.prebuilt, reverse=True)
         if not os.path.exists(common.vmlinux):
-            # This would allow us to run the prebuilt QEMU Linux image.
-            # but TODO cannot convert Image to vmlinux on aarch64:
-            # run-detectors: unable to find an interpreter for
+            # This is to run gem5 from a prebuilt download.
             if not os.path.exists(common.linux_image):
                 raise Exception('Linux kernel image not found. Did you compile it?\n' \
                                 'Tried: ' + common.vmlinux)
@@ -305,11 +303,11 @@ def main(args, extra_args=None):
     if args.gem5:
         # We have to do some parsing here because gem5 exits with status 0 even when panic happens.
         # Grepping for '^panic: ' does not work because some errors don't show that message.
-        panic_msg = '--- BEGIN LIBC BACKTRACE ---$'
+        panic_msg = b'--- BEGIN LIBC BACKTRACE ---$'
     else:
-        panic_msg = 'Kernel panic - not syncing'
+        panic_msg = b'Kernel panic - not syncing'
     panic_re = re.compile(panic_msg)
-    with open(common.termout_file, 'r') as logfile:
+    with open(common.termout_file, 'br') as logfile:
         for line in logfile:
             if panic_re.search(line):
                 common.log_error('simulation error detected by parsing logs')
diff --git a/test b/test
index e8e9eea..a9743c2 100755
--- a/test
+++ b/test
@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 set -eu
 ./bench-boot -t "${1:-1}"
-./run -F '/test_all.sh;/poweroff.out' | grep -q lkmc_test_pass
+./test-kernel-modules
diff --git a/test-kernel-modules b/test-kernel-modules
new file mode 100755
index 0000000..83a539a
--- /dev/null
+++ b/test-kernel-modules
@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -eu
+root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+getvar="${root_dir}/getvar"
+termout_file="$("$getvar" termout_file)"
+./run --eval-busybox '/test_all.sh;/poweroff.out' --kvm
+grep -q lkmc_test_pass "$termout_file"