Index: compiler-rt/test/fuzzer/lit.cfg
===================================================================
--- compiler-rt/test/fuzzer/lit.cfg
+++ compiler-rt/test/fuzzer/lit.cfg
@@ -24,6 +24,9 @@
 # the test runner updated.
 config.test_format = lit.formats.ShTest(execute_external)
 
+if config.have_zlib == "1":
+    config.available_features.add("zlib")
+
 # LeakSanitizer is not supported on OSX or Windows right now.
 if (sys.platform.startswith('darwin') or
     sys.platform.startswith('freebsd') or
Index: compiler-rt/test/fuzzer/lit.site.cfg.in
===================================================================
--- compiler-rt/test/fuzzer/lit.site.cfg.in
+++ compiler-rt/test/fuzzer/lit.site.cfg.in
@@ -12,6 +12,8 @@
 config.llvm_library_dir = "@LLVM_LIBRARY_DIR@"
 config.target_triple = "@TARGET_TRIPLE@"
 
+config.have_zlib = "@HAVE_LIBZ@"
+
 # Load common config for all compiler-rt lit tests.
 lit_config.load_config(config,
     "@COMPILER_RT_BINARY_DIR@/test/lit.common.configured")