diff --git a/tests/test-http-protocol.t b/tests/test-http-protocol.t
--- a/tests/test-http-protocol.t
+++ b/tests/test-http-protocol.t
@@ -20,7 +20,7 @@ compression formats are advertised in co
   compression=zstd,zlib
 #else
   $ get-with-headers.py 127.0.0.1:$HGPORT '?cmd=capabilities' | tr ' ' '\n' | grep compression
-  compression=ZL
+  compression=zlib
 #endif
 
   $ killdaemons.py
diff --git a/tests/test-treediscovery.t b/tests/test-treediscovery.t
--- a/tests/test-treediscovery.t
+++ b/tests/test-treediscovery.t
@@ -503,6 +503,7 @@ Both have new stuff in existing named br
   no changes found
   [1]
   $ cd ..
+#if zstd
   $ tstop show
   "GET /?cmd=capabilities HTTP/1.1" 200 -
   "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zstd,zlib,none,bzip2
@@ -534,3 +535,36 @@ Both have new stuff in existing named br
   "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zstd,zlib,none,bzip2
   "GET /?cmd=capabilities HTTP/1.1" 200 -
   "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zstd,zlib,none,bzip2
+#else
+  $ tstop show
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=branches HTTP/1.1" 200 - x-hgarg-1:nodes=d8f638ac69e9ae8dea4f09f11d696546a912d961 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=between HTTP/1.1" 200 - x-hgarg-1:pairs=d8f638ac69e9ae8dea4f09f11d696546a912d961-d57206cc072a18317c1e381fb60aa31bd3401785 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=changegroupsubset HTTP/1.1" 200 - x-hgarg-1:bases=d8f638ac69e9ae8dea4f09f11d696546a912d961&heads=d8f638ac69e9ae8dea4f09f11d696546a912d961 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=branches HTTP/1.1" 200 - x-hgarg-1:nodes=d8f638ac69e9ae8dea4f09f11d696546a912d961 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=between HTTP/1.1" 200 - x-hgarg-1:pairs=d8f638ac69e9ae8dea4f09f11d696546a912d961-d57206cc072a18317c1e381fb60aa31bd3401785 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=branches HTTP/1.1" 200 - x-hgarg-1:nodes=d8f638ac69e9ae8dea4f09f11d696546a912d961 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=between HTTP/1.1" 200 - x-hgarg-1:pairs=d8f638ac69e9ae8dea4f09f11d696546a912d961-d57206cc072a18317c1e381fb60aa31bd3401785 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=changegroupsubset HTTP/1.1" 200 - x-hgarg-1:bases=d8f638ac69e9ae8dea4f09f11d696546a912d961&heads=d8f638ac69e9ae8dea4f09f11d696546a912d961 x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=branchmap HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=branchmap HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "POST /?cmd=unbundle HTTP/1.1" 200 - x-hgarg-1:heads=686173686564+1827a5bb63e602382eb89dd58f2ac9f3b007ad91* (glob)
+  "GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+  "GET /?cmd=capabilities HTTP/1.1" 200 -
+  "GET /?cmd=heads HTTP/1.1" 200 - x-hgproto-1:0.1 0.2 comp=zlib,none,bzip2
+#endif