diff --git a/substrate/.gitlab-ci.yml b/substrate/.gitlab-ci.yml
index e5eba33e55..6cdc822f96 100644
--- a/substrate/.gitlab-ci.yml
+++ b/substrate/.gitlab-ci.yml
@@ -39,7 +39,7 @@ variables:
   ARCH:                            "x86_64"
   # FIXME set to release
   CARGO_UNLEASH_INSTALL_PARAMS:    "--version 1.0.0-alpha.10"
-  CARGO_UNLEASH_PKG_DEF:           "--skip node node-* pallet-template pallet-example pallet-example-* subkey chain-spec-builder sp-arithmetic-fuzzer"
+  CARGO_UNLEASH_PKG_DEF:           "--skip node node-* pallet-template pallet-example pallet-example-* subkey chain-spec-builder"
   CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUNNER: "wasm-bindgen-test-runner"
   WASM_BINDGEN_TEST_TIMEOUT:                  120
   CHROMEDRIVER_ARGS:                          "--log-level=INFO --whitelisted-ips=127.0.0.1"
diff --git a/substrate/primitives/arithmetic/fuzzer/Cargo.toml b/substrate/primitives/arithmetic/fuzzer/Cargo.toml
index b7a63c4566..f145c2cd90 100644
--- a/substrate/primitives/arithmetic/fuzzer/Cargo.toml
+++ b/substrate/primitives/arithmetic/fuzzer/Cargo.toml
@@ -8,6 +8,7 @@ homepage = "https://substrate.dev"
 repository = "https://github.com/paritytech/substrate/"
 description = "Fuzzer for fixed point arithmetic primitives."
 documentation = "https://docs.rs/sp-arithmetic-fuzzer"
+publish = false
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/substrate/primitives/phragmen/fuzzer/Cargo.toml b/substrate/primitives/phragmen/fuzzer/Cargo.toml
index 4c1e16906a..a26e6e9f89 100644
--- a/substrate/primitives/phragmen/fuzzer/Cargo.toml
+++ b/substrate/primitives/phragmen/fuzzer/Cargo.toml
@@ -8,6 +8,7 @@ homepage = "https://substrate.dev"
 repository = "https://github.com/paritytech/substrate/"
 description = "Fuzzer for phragmén implementation."
 documentation = "https://docs.rs/sp-phragmen-fuzzer"
+publish = false
 
 [dependencies]
 sp-phragmen = { version = "2.0.0-alpha.5", path = ".." }