diff --git a/integration-tests/events/Cargo.toml b/integration-tests/events/Cargo.toml
index ea3e208af24..f7a621fbb7c 100644
--- a/integration-tests/events/Cargo.toml
+++ b/integration-tests/events/Cargo.toml
@@ -7,8 +7,6 @@ publish = false
 
 [dependencies]
 ink = { path = "../../crates/ink", default-features = false }
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 event-def = { path = "event-def", default-features = false }
 event-def2 = { path = "event-def2", default-features = false }
diff --git a/integration-tests/events/event-def-unused/Cargo.toml b/integration-tests/events/event-def-unused/Cargo.toml
index cf5f1800e35..1bdfc90af33 100644
--- a/integration-tests/events/event-def-unused/Cargo.toml
+++ b/integration-tests/events/event-def-unused/Cargo.toml
@@ -5,8 +5,6 @@ edition = "2021"
 
 [dependencies]
 ink = { path = "../../../crates/ink", default-features = false }
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [features]
 default = ["std"]
diff --git a/integration-tests/events/event-def/Cargo.toml b/integration-tests/events/event-def/Cargo.toml
index dffc908207a..902d532e8ff 100644
--- a/integration-tests/events/event-def/Cargo.toml
+++ b/integration-tests/events/event-def/Cargo.toml
@@ -5,8 +5,6 @@ edition = "2021"
 
 [dependencies]
 ink = { path = "../../../crates/ink", default-features = false }
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [features]
 default = ["std"]
diff --git a/integration-tests/events/event-def2/Cargo.toml b/integration-tests/events/event-def2/Cargo.toml
index 2e00450b90e..18bc859173d 100644
--- a/integration-tests/events/event-def2/Cargo.toml
+++ b/integration-tests/events/event-def2/Cargo.toml
@@ -5,8 +5,6 @@ edition = "2021"
 
 [dependencies]
 ink = { path = "../../../crates/ink", default-features = false }
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [features]
 default = ["std"]
diff --git a/integration-tests/lang-err-integration-tests/contract-ref/Cargo.toml b/integration-tests/lang-err-integration-tests/contract-ref/Cargo.toml
index 7f6c6871b14..04807354ec1 100755
--- a/integration-tests/lang-err-integration-tests/contract-ref/Cargo.toml
+++ b/integration-tests/lang-err-integration-tests/contract-ref/Cargo.toml
@@ -7,9 +7,6 @@ edition = "2021"
 [dependencies]
 ink = { path = "../../../crates/ink", default-features = false }
 
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2", default-features = false, features = ["derive"], optional = true }
-
 integration_flipper = { path = "../integration-flipper", default-features = false, features = ["ink-as-dependency"] }
 
 [dev-dependencies]
diff --git a/integration-tests/sr25519-verification/Cargo.toml b/integration-tests/sr25519-verification/Cargo.toml
index 6b367bd7c29..6c662ee5bba 100644
--- a/integration-tests/sr25519-verification/Cargo.toml
+++ b/integration-tests/sr25519-verification/Cargo.toml
@@ -8,9 +8,6 @@ publish = false
 [dependencies]
 ink = { path = "../../crates/ink", default-features = false }
 
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
-
 [dev-dependencies]
 ink_e2e = { path = "../../crates/e2e" }
 
diff --git a/integration-tests/trait-incrementer/Cargo.toml b/integration-tests/trait-incrementer/Cargo.toml
index 143fcea6c64..99d412f5486 100644
--- a/integration-tests/trait-incrementer/Cargo.toml
+++ b/integration-tests/trait-incrementer/Cargo.toml
@@ -8,8 +8,6 @@ publish = false
 [dependencies]
 ink = { path = "../../crates/ink", default-features = false }
 
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 traits = { path = "./traits", default-features = false }
 
 [lib]
diff --git a/integration-tests/wildcard-selector/Cargo.toml b/integration-tests/wildcard-selector/Cargo.toml
index 61f6051407a..802bc8de31f 100644
--- a/integration-tests/wildcard-selector/Cargo.toml
+++ b/integration-tests/wildcard-selector/Cargo.toml
@@ -8,9 +8,6 @@ publish = false
 [dependencies]
 ink = { path = "../../crates/ink", default-features = false }
 
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
-
 [dev-dependencies]
 ink_e2e = { path = "../../crates/e2e" }