diff --git a/makefile b/makefile
index 9009737..e291721 100644
--- a/makefile
+++ b/makefile
@@ -22,7 +22,7 @@ clean:
 	rm -f looper integration_test src/*.o
 
 check:
-	cppcheck --enable=all --error-exitcode=1 --suppress=missingIncludeSystem --suppress=usleepCalled --suppress=unreadVariable --suppress=normalCheckLevelMaxBranches src/*.c --library=posix .
+	cppcheck --enable=all --error-exitcode=1 --suppress=unreadVariable src/*.c --library=posix .
 
 # Optional: Format code using clang-format
 format:
diff --git a/src/channel.c b/src/channel.c
index e68e371..8eaf4d7 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -1,3 +1,4 @@
+// cppcheck-suppress missingIncludeSystem
 #include "channel.h"
 #include <jack/jack.h>
 #include <stdatomic.h>
diff --git a/src/channel.h b/src/channel.h
index cb51698..a0c2f89 100644
--- a/src/channel.h
+++ b/src/channel.h
@@ -1,6 +1,7 @@
 #ifndef CHANNEL_H
 #define CHANNEL_H
 
+// cppcheck-suppress missingIncludeSystem
 #include <jack/jack.h>
 #include <stdatomic.h>
 
diff --git a/src/looper.c b/src/looper.c
index e343b77..299a8a2 100644
--- a/src/looper.c
+++ b/src/looper.c
@@ -1,3 +1,4 @@
+// cppcheck-suppress missingIncludeSystem
 #include "looper.h"
 #include "channel.h"
 #include "midi.h"
diff --git a/src/looper.h b/src/looper.h
index 7fb68d4..9e064a5 100644
--- a/src/looper.h
+++ b/src/looper.h
@@ -1,6 +1,7 @@
 #ifndef LOOPER_H
 #define LOOPER_H
 
+// cppcheck-suppress missingIncludeSystem
 #include <jack/jack.h>
 
 /* Initialisation – must be called after setting process callback */
diff --git a/src/main.c b/src/main.c
index b5c816c..9a82edd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,3 +1,4 @@
+// cppcheck-suppress missingIncludeSystem
 #include "looper.h"
 #include <jack/jack.h>
 #include <stdio.h>
diff --git a/src/midi.c b/src/midi.c
index e3471cf..bac71c5 100644
--- a/src/midi.c
+++ b/src/midi.c
@@ -1,3 +1,4 @@
+// cppcheck-suppress missingIncludeSystem
 #include "midi.h"
 #include "channel.h"
 #include <jack/jack.h>
diff --git a/src/midi.h b/src/midi.h
index 08b5eeb..d5e57d2 100644
--- a/src/midi.h
+++ b/src/midi.h
@@ -1,6 +1,7 @@
 #ifndef MIDI_H
 #define MIDI_H
 
+// cppcheck-suppress missingIncludeSystem
 #include <jack/types.h>
 
 void midi_handle_events(void *port_buffer, jack_nframes_t nframes);
diff --git a/tests/integration.c b/tests/integration.c
index de4b3ff..07f144b 100644
--- a/tests/integration.c
+++ b/tests/integration.c
@@ -1,3 +1,6 @@
+// cppcheck-suppress missingIncludeSystem
+// cppcheck-suppress usleepCalled
+// cppcheck-suppress normalCheckLevelMaxBranches
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>