diff --git a/tests/build-hook-ca.nix b/tests/build-hook-ca.nix
index 98db473fc..67295985f 100644
--- a/tests/build-hook-ca.nix
+++ b/tests/build-hook-ca.nix
@@ -11,6 +11,7 @@ let
       args = ["sh" "-e" args.builder or (builtins.toFile "builder-${args.name}.sh" "if [ -e .attrs.sh ]; then source .attrs.sh; fi; eval \"$buildCommand\"")];
       outputHashMode = "recursive";
       outputHashAlgo = "sha256";
+      __contentAddressed = true;
     } // removeAttrs args ["builder" "meta"])
     // { meta = args.meta or {}; };
 
@@ -19,7 +20,6 @@ let
     name = "build-remote-input-1";
     buildCommand = "echo FOO > $out";
     requiredSystemFeatures = ["foo"];
-    outputHash = "sha256-FePFYIlMuycIXPZbWi7LGEiMmZSX9FMbaQenWBzm1Sc=";
   };
 
   input2 = mkDerivation {
@@ -27,7 +27,16 @@ let
     name = "build-remote-input-2";
     buildCommand = "echo BAR > $out";
     requiredSystemFeatures = ["bar"];
-    outputHash = "sha256-XArauVH91AVwP9hBBQNlkX9ccuPpSYx9o0zeIHb6e+Q=";
+  };
+
+  input3 = mkDerivation {
+    shell = busybox;
+    name = "build-remote-input-3";
+    buildCommand = ''
+      read x < ${input2}
+      echo $x BAZ > $out
+    '';
+    requiredSystemFeatures = ["baz"];
   };
 
 in
@@ -38,8 +47,7 @@ in
     buildCommand =
       ''
         read x < ${input1}
-        read y < ${input2}
+        read y < ${input3}
         echo "$x $y" > $out
       '';
-    outputHash = "sha256-3YGhlOfbGUm9hiPn2teXXTT8M1NEpDFvfXkxMaJRld0=";
   }
diff --git a/tests/build-remote-content-addressed-fixed.sh b/tests/build-remote-content-addressed-fixed.sh
deleted file mode 100644
index 1408a19d5..000000000
--- a/tests/build-remote-content-addressed-fixed.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-source common.sh
-
-file=build-hook-ca.nix
-
-source build-remote.sh
diff --git a/tests/build-remote-content-addressed-floating.sh b/tests/build-remote-content-addressed-floating.sh
new file mode 100644
index 000000000..cbb75729b
--- /dev/null
+++ b/tests/build-remote-content-addressed-floating.sh
@@ -0,0 +1,7 @@
+source common.sh
+
+file=build-hook-ca.nix
+
+sed -i 's/experimental-features .*/& ca-derivations/' "$NIX_CONF_DIR"/nix.conf
+
+source build-remote.sh
diff --git a/tests/local.mk b/tests/local.mk
index aa8b4f9bf..9bde2322f 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -17,6 +17,7 @@ nix_tests = \
   linux-sandbox.sh \
   build-dry.sh \
   build-remote-input-addressed.sh \
+  build-remote-content-addressed-floating.sh \
   ssh-relay.sh \
   nar-access.sh \
   structured-attrs.sh \
@@ -40,7 +41,6 @@ nix_tests = \
   content-addressed.sh \
   build.sh
   # parallel.sh
-  # build-remote-content-addressed-fixed.sh \
 
 install-tests += $(foreach x, $(nix_tests), tests/$(x))