diff --git a/tests-clar/clar.c b/tests-clar/clar.c
index fb10dd397..585af8a74 100644
--- a/tests-clar/clar.c
+++ b/tests-clar/clar.c
@@ -36,7 +36,7 @@
 #		define strncpy(to, from, to_size) strncpy_s(to, to_size, from, _TRUNCATE)
 #		define W_OK 02
 #		define S_ISDIR(x) ((x & _S_IFDIR) != 0)
-#		define snprint_eq(buf,sz,fmt,a,b) _snprintf_s(buf,sz,_TRUNCATE,fmt,a,b)
+#		define snprint_eq(buf,sz,fmt,...) _snprintf_s(buf,sz,_TRUNCATE,fmt,__VA_ARGS__)
 #	else
 #		define snprint_eq snprintf
 #	endif
diff --git a/tests-clar/clar/sandbox.h b/tests-clar/clar/sandbox.h
index 5622bfab7..1ca6fcae8 100644
--- a/tests-clar/clar/sandbox.h
+++ b/tests-clar/clar/sandbox.h
@@ -45,7 +45,7 @@ find_tmp_path(char *buffer, size_t length)
 #else
 	DWORD env_len;
 
-	if ((env_len = GetEnvironmentVariable("CLAR_TMP", buffer, (DWORD)length)) > 0 &&
+	if ((env_len = GetEnvironmentVariable("CLAR_TMP", buffer, length)) > 0 &&
 		env_len < length)
 		return 0;