diff --git a/test/quirks/quirks.h b/test/quirks/quirks.h
new file mode 100644
index 00000000..00caf7c9
--- /dev/null
+++ b/test/quirks/quirks.h
@@ -0,0 +1,26 @@
+
+#include <stdlib.h>
+
+#ifdef __EMSCRIPTEN__
+# define strcmp(s1, s2) xstrcmp(s1, s2)
+
+int
+strcmp(const char *s1, const char *s2) {
+    while (*s1 == *s2++) { if (*s1++ == 0) return 0; }
+    return *(unsigned char *) s1 - *(unsigned char *) --s2;
+}
+#endif
+
+#ifdef _WIN32
+static void
+srandom(unsigned seed)
+{
+    srand(seed);
+}
+
+static long
+random(void)
+{
+    return (long) rand();
+}
+#endif