diff --git a/13_integrated_testing/Cargo.toml b/13_integrated_testing/Cargo.toml
index c8b1c0be..7dc4da5d 100644
--- a/13_integrated_testing/Cargo.toml
+++ b/13_integrated_testing/Cargo.toml
@@ -16,7 +16,7 @@ test-types = { path = "test-types" }
 
 # Optional dependencies
 cortex-a = { version = "3.0.x", optional = true }
-register = { version = "0.5.x", features=["no_std_unit_tests"], optional = true }
+register = { version = "0.5.x", features = ["no_std_unit_tests"], optional = true }
 
 ##--------------------------------------------------------------------------------------------------
 ## Testing
diff --git a/14_exceptions_part2_peripheral_IRQs/Cargo.toml b/14_exceptions_part2_peripheral_IRQs/Cargo.toml
index c8b1c0be..7dc4da5d 100644
--- a/14_exceptions_part2_peripheral_IRQs/Cargo.toml
+++ b/14_exceptions_part2_peripheral_IRQs/Cargo.toml
@@ -16,7 +16,7 @@ test-types = { path = "test-types" }
 
 # Optional dependencies
 cortex-a = { version = "3.0.x", optional = true }
-register = { version = "0.5.x", features=["no_std_unit_tests"], optional = true }
+register = { version = "0.5.x", features = ["no_std_unit_tests"], optional = true }
 
 ##--------------------------------------------------------------------------------------------------
 ## Testing