diff --git a/.github/workflows/runtests.yml b/.github/workflows/runtests.yml
index 06f2b07..1567da5 100644
--- a/.github/workflows/runtests.yml
+++ b/.github/workflows/runtests.yml
@@ -17,4 +17,4 @@ jobs:
       with:
         submodules: true
     - name: build and run unit test
-      run: bazel test //test:all
+      run: bazel test //test:all --test_tag_filters=-vcan
diff --git a/BUILD b/BUILD
index 026f950..b3b7ba9 100644
--- a/BUILD
+++ b/BUILD
@@ -12,7 +12,7 @@ genrule(
     name = "isotp_c_wrapped_h",
     srcs = glob(["src/tp/isotp-c/*.h"]),
     outs = ["isotp_c_wrapped.h"],
-    cmd = "echo '#if defined(UDS_ISOTP_C)' >> $(OUTS) ; for f in $(SRCS); do cat $$f >> $(OUTS); done ; echo '#endif' >> $(OUTS); cat $(OUTS)",
+    cmd = "echo '#if defined(UDS_ISOTP_C)' >> $(OUTS) ; for f in $(SRCS); do cat $$f >> $(OUTS); done ; echo '#endif' >> $(OUTS)",
 )
 
 genrule(
@@ -30,7 +30,7 @@ genrule(
             ":isotp_c_wrapped.h",
         ],
     outs = ["iso14229.h"],
-    cmd = "echo $(SRCS); (cat ; echo '#ifndef ISO14229_H'; echo '#define ISO14229_H'; echo; echo '#ifdef __cplusplus'; echo 'extern \"C\" {'; echo '#endif'; cat src/sys.h src/sys_arduino.h src/sys_unix.h src/sys_win32.h src/sys_esp32.h src/config.h src/util.h src/tp.h src/uds.h src/client.h src/server.h $(location //:isotp_c_wrapped.h) src/tp/*.h |sed -e 's,#include \".*,,' -e 's,^#pragma once,,' ; echo '#endif'; echo '#ifdef __cplusplus'; echo '}'; echo '#endif';) > $(OUTS) && cat $(OUTS)",
+    cmd = "echo $(SRCS); (cat ; echo '#ifndef ISO14229_H'; echo '#define ISO14229_H'; echo; echo '#ifdef __cplusplus'; echo 'extern \"C\" {'; echo '#endif'; cat src/sys.h src/sys_arduino.h src/sys_unix.h src/sys_win32.h src/sys_esp32.h src/config.h src/util.h src/tp.h src/uds.h src/client.h src/server.h $(location //:isotp_c_wrapped.h) src/tp/*.h |sed -e 's,#include \".*,,' -e 's,^#pragma once,,' ; echo '#endif'; echo '#ifdef __cplusplus'; echo '}'; echo '#endif';) > $(OUTS)",
 )
 
 filegroup(
diff --git a/test/BUILD b/test/BUILD
index e595b4e..5ea4fcc 100644
--- a/test/BUILD
+++ b/test/BUILD
@@ -66,7 +66,7 @@ TEST_NAMES = [ src.split(".c")[0] for src in TEST_SRCS ]
         size = "small",
         env = { "UDS_TP_TYPE": "1"},
         copts = ["-g"],
-        tags = [ "exclusive", ],
+        tags = [ "exclusive", "vcan"],
     ) for name, src in zip(TEST_NAMES, TEST_SRCS)
 ]
 
@@ -78,11 +78,10 @@ TEST_NAMES = [ src.split(".c")[0] for src in TEST_SRCS ]
         size = "small",
         env = { "UDS_TP_TYPE": "2"},
         copts = ["-g"],
-        tags = [ "exclusive", ],
+        tags = [ "exclusive", "vcan"],
     ) for name, src in zip(TEST_NAMES, TEST_SRCS)
 ]
 
-
 cc_test(
     name = "test_fuzz_server",
     srcs = [