diff --git a/test/command_callback/test_c_cppcheck_command_callbacks.vader b/test/command_callback/test_c_cppcheck_command_callbacks.vader
index 7f1a7c2f..3d487a31 100644
--- a/test/command_callback/test_c_cppcheck_command_callbacks.vader
+++ b/test/command_callback/test_c_cppcheck_command_callbacks.vader
@@ -27,7 +27,9 @@ Execute(cppcheck for C should detect compile_commands.json files):
   AssertLinter 'cppcheck',
   \ ale#path#CdString(ale#path#Simplify(g:dir . '/cppcheck_paths/one'))
   \   . ale#Escape('cppcheck')
-  \   . ' -q --language=c --project=''compile_commands.json'' --enable=style %t'
+  \   . ' -q --language=c'
+  \   . ' --project=' . ale#Escape('compile_commands.json')
+  \   . ' --enable=style %t'
 
 Execute(cppcheck for C should detect compile_commands.json files in build directories):
   call ale#test#SetFilename('cppcheck_paths/with_build_dir/foo.cpp')
diff --git a/test/command_callback/test_cpp_cppcheck_command_callbacks.vader b/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
index 13b0741e..02bdf748 100644
--- a/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
+++ b/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
@@ -25,7 +25,9 @@ Execute(cppcheck for C++ should detect compile_commands.json files):
   AssertLinter 'cppcheck',
   \ ale#path#CdString(ale#path#Simplify(g:dir . '/cppcheck_paths/one'))
   \   . ale#Escape('cppcheck')
-  \   . ' -q --language=c++ --project=''compile_commands.json'' --enable=style %t'
+  \   . ' -q --language=c++'
+  \   . ' --project=' . ale#Escape('compile_commands.json')
+  \   . ' --enable=style %t'
 
 Execute(cppcheck for C++ should detect compile_commands.json files in build directories):
   call ale#test#SetFilename('cppcheck_paths/with_build_dir/foo.cpp')