diff --git a/cumulus/bridges/primitives/test-utils/Cargo.toml b/cumulus/bridges/primitives/test-utils/Cargo.toml
index c379c6792cbc..fc6e5859141e 100644
--- a/cumulus/bridges/primitives/test-utils/Cargo.toml
+++ b/cumulus/bridges/primitives/test-utils/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+publish = false
 
 [dependencies]
 bp-header-chain = { path = "../header-chain", default-features = false  }
diff --git a/cumulus/parachain-template/node/Cargo.toml b/cumulus/parachain-template/node/Cargo.toml
index d85fd5a6178b..f4fdfc64facb 100644
--- a/cumulus/parachain-template/node/Cargo.toml
+++ b/cumulus/parachain-template/node/Cargo.toml
@@ -8,6 +8,7 @@ homepage = "https://substrate.io"
 repository.workspace = true
 edition.workspace = true
 build = "build.rs"
+publish = false
 
 [dependencies]
 clap = { version = "4.3.24", features = ["derive"] }
diff --git a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-kusama/Cargo.toml b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-kusama/Cargo.toml
index 6c3cf42ff355..7c870e0220c5 100644
--- a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-kusama/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-kusama/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Asset Hub Kusama runtime integration tests with xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-polkadot/Cargo.toml b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-polkadot/Cargo.toml
index e3c49d4f200c..174091d881b4 100644
--- a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-polkadot/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-polkadot/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Asset Hub Polkadot runtime integration tests with xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml
index 548c9a5f407c..798ba7d3f3a1 100644
--- a/cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Asset Hub Westend runtime integration tests with xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/integration-tests/emulated/bridges/bridge-hub-rococo/Cargo.toml b/cumulus/parachains/integration-tests/emulated/bridges/bridge-hub-rococo/Cargo.toml
index c4aba4f9110c..e81e7a194899 100644
--- a/cumulus/parachains/integration-tests/emulated/bridges/bridge-hub-rococo/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/bridges/bridge-hub-rococo/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Bridge Hub Rococo runtime integration tests with xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/integration-tests/emulated/collectives/collectives-polkadot/Cargo.toml b/cumulus/parachains/integration-tests/emulated/collectives/collectives-polkadot/Cargo.toml
index 1d0069dfd00e..accb04db7f32 100644
--- a/cumulus/parachains/integration-tests/emulated/collectives/collectives-polkadot/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/collectives/collectives-polkadot/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 description = "Polkadot Collectives parachain runtime integration tests based on xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/integration-tests/emulated/common/Cargo.toml b/cumulus/parachains/integration-tests/emulated/common/Cargo.toml
index 47c5f96fd800..e14969deeab4 100644
--- a/cumulus/parachains/integration-tests/emulated/common/Cargo.toml
+++ b/cumulus/parachains/integration-tests/emulated/common/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Common resources for integration testing with xcm-emulator"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
diff --git a/cumulus/parachains/runtimes/assets/test-utils/Cargo.toml b/cumulus/parachains/runtimes/assets/test-utils/Cargo.toml
index 46b82b3ebb23..baf66a158725 100644
--- a/cumulus/parachains/runtimes/assets/test-utils/Cargo.toml
+++ b/cumulus/parachains/runtimes/assets/test-utils/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Test utils for Asset Hub runtimes."
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "max-encoded-len"] }
diff --git a/cumulus/parachains/runtimes/bridge-hubs/test-utils/Cargo.toml b/cumulus/parachains/runtimes/bridge-hubs/test-utils/Cargo.toml
index 147166f21685..18a8d56a60ef 100644
--- a/cumulus/parachains/runtimes/bridge-hubs/test-utils/Cargo.toml
+++ b/cumulus/parachains/runtimes/bridge-hubs/test-utils/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 description = "Utils for BridgeHub testing"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "max-encoded-len"] }
diff --git a/cumulus/parachains/runtimes/test-utils/Cargo.toml b/cumulus/parachains/runtimes/test-utils/Cargo.toml
index 94b73d5e39dc..76ce2b9907e2 100644
--- a/cumulus/parachains/runtimes/test-utils/Cargo.toml
+++ b/cumulus/parachains/runtimes/test-utils/Cargo.toml
@@ -4,6 +4,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 description = "Utils for Runtimes testing"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "max-encoded-len"] }
diff --git a/cumulus/parachains/runtimes/testing/penpal/Cargo.toml b/cumulus/parachains/runtimes/testing/penpal/Cargo.toml
index acaaadf04dd2..cd36927afec8 100644
--- a/cumulus/parachains/runtimes/testing/penpal/Cargo.toml
+++ b/cumulus/parachains/runtimes/testing/penpal/Cargo.toml
@@ -7,6 +7,7 @@ license = "Unlicense"
 homepage = "https://substrate.io"
 repository.workspace = true
 edition.workspace = true
+publish = false
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/cumulus/parachains/runtimes/testing/rococo-parachain/Cargo.toml b/cumulus/parachains/runtimes/testing/rococo-parachain/Cargo.toml
index 6e9f9f3039c0..361f77591999 100644
--- a/cumulus/parachains/runtimes/testing/rococo-parachain/Cargo.toml
+++ b/cumulus/parachains/runtimes/testing/rococo-parachain/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 description = "Simple runtime used by the rococo parachain(s)"
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"] }
diff --git a/cumulus/test/client/Cargo.toml b/cumulus/test/client/Cargo.toml
index 5d8c6643c3c7..4e07be3368e2 100644
--- a/cumulus/test/client/Cargo.toml
+++ b/cumulus/test/client/Cargo.toml
@@ -3,6 +3,7 @@ name = "cumulus-test-client"
 version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [ "derive" ] }
diff --git a/cumulus/test/relay-sproof-builder/Cargo.toml b/cumulus/test/relay-sproof-builder/Cargo.toml
index e044b92f7c4a..c987a2b66c90 100644
--- a/cumulus/test/relay-sproof-builder/Cargo.toml
+++ b/cumulus/test/relay-sproof-builder/Cargo.toml
@@ -3,6 +3,7 @@ name = "cumulus-test-relay-sproof-builder"
 version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [ "derive" ] }
diff --git a/cumulus/test/relay-validation-worker-provider/Cargo.toml b/cumulus/test/relay-validation-worker-provider/Cargo.toml
index eaa1ce8dc47c..b7c59e832995 100644
--- a/cumulus/test/relay-validation-worker-provider/Cargo.toml
+++ b/cumulus/test/relay-validation-worker-provider/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 build = "build.rs"
+publish = false
 
 [dependencies]
 
diff --git a/cumulus/test/runtime/Cargo.toml b/cumulus/test/runtime/Cargo.toml
index 9fe4c55bbd79..dbfe9f46b1bd 100644
--- a/cumulus/test/runtime/Cargo.toml
+++ b/cumulus/test/runtime/Cargo.toml
@@ -3,6 +3,7 @@ name = "cumulus-test-runtime"
 version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"] }
diff --git a/cumulus/test/service/Cargo.toml b/cumulus/test/service/Cargo.toml
index ad007c509ffb..2869af94a775 100644
--- a/cumulus/test/service/Cargo.toml
+++ b/cumulus/test/service/Cargo.toml
@@ -3,6 +3,7 @@ name = "cumulus-test-service"
 version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
+publish = false
 
 [[bin]]
 name = "test-parachain"
diff --git a/cumulus/xcm/xcm-emulator/Cargo.toml b/cumulus/xcm/xcm-emulator/Cargo.toml
index 8560b6401f78..58666ec39ec5 100644
--- a/cumulus/xcm/xcm-emulator/Cargo.toml
+++ b/cumulus/xcm/xcm-emulator/Cargo.toml
@@ -4,6 +4,7 @@ description = "Test kit to emulate XCM program execution."
 version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0" }
diff --git a/polkadot/xcm/xcm-simulator/fuzzer/Cargo.toml b/polkadot/xcm/xcm-simulator/fuzzer/Cargo.toml
index f585d5064563..bfc96656bcf4 100644
--- a/polkadot/xcm/xcm-simulator/fuzzer/Cargo.toml
+++ b/polkadot/xcm/xcm-simulator/fuzzer/Cargo.toml
@@ -5,6 +5,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 license.workspace = true
+publish = false
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.6.1" }