diff --git a/module/core/collection_tools/Readme.md b/module/core/collection_tools/Readme.md
index 1eae122a75..74d990ea1e 100644
--- a/module/core/collection_tools/Readme.md
+++ b/module/core/collection_tools/Readme.md
@@ -120,7 +120,7 @@ While strict macros require you to have all members of the same type, more relax
 
 For example:
 ```rust
-# #[ cfg( all( feature = "enabled", feature = "collection_into_constructors" ) ) ]
+# #[ cfg( all( feature = "enabled", feature = "collection_into_constructors", any( not( feature = "no_std" ), feature = "use_alloc" ) ) ) ]
 # {
 use std::borrow::Cow;
 let vec : Vec< String > = collection_tools::into_vec!( "&str", "String".to_string(), Cow::from( "Cow" ) );
diff --git a/module/core/collection_tools/src/lib.rs b/module/core/collection_tools/src/lib.rs
index 93f360a73e..d37a4bcb8f 100644
--- a/module/core/collection_tools/src/lib.rs
+++ b/module/core/collection_tools/src/lib.rs
@@ -4,6 +4,7 @@
 #![ doc( html_root_url = "https://docs.rs/collection_tools/latest/collection_tools/" ) ]
 #![ doc = include_str!( concat!( env!( "CARGO_MANIFEST_DIR" ), "/", "Readme.md" ) ) ]
 
+#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 extern crate alloc;
 
 // qqq : make subdirectory for each container -- done
@@ -12,7 +13,10 @@ extern crate alloc;
 
 /// Module containing all collection macros
 #[ cfg( feature = "enabled" ) ]
+#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 mod collections;
+#[ cfg( feature = "enabled" ) ]
+#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 pub use collections::*;
 
 /// Namespace with dependencies.
diff --git a/module/core/collection_tools/tests/inc/bmap.rs b/module/core/collection_tools/tests/inc/bmap.rs
index d08e871a01..f9034314aa 100644
--- a/module/core/collection_tools/tests/inc/bmap.rs
+++ b/module/core/collection_tools/tests/inc/bmap.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -13,8 +12,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -51,7 +50,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/bset.rs b/module/core/collection_tools/tests/inc/bset.rs
index 11a5c49a58..b08f7593c4 100644
--- a/module/core/collection_tools/tests/inc/bset.rs
+++ b/module/core/collection_tools/tests/inc/bset.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -12,8 +11,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -31,8 +30,8 @@ fn constructor()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_into_constructors" ) ]
+#[ test ]
 fn into_constructor()
 {
 
@@ -50,7 +49,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/heap.rs b/module/core/collection_tools/tests/inc/heap.rs
index 632899d65f..a342548cfc 100644
--- a/module/core/collection_tools/tests/inc/heap.rs
+++ b/module/core/collection_tools/tests/inc/heap.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -13,8 +12,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -32,8 +31,8 @@ fn constructor()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_into_constructors" ) ]
+#[ test ]
 fn into_constructor()
 {
 
@@ -51,7 +50,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/hmap.rs b/module/core/collection_tools/tests/inc/hmap.rs
index 04c8223e24..1d5d0027d1 100644
--- a/module/core/collection_tools/tests/inc/hmap.rs
+++ b/module/core/collection_tools/tests/inc/hmap.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -21,8 +20,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -41,8 +40,8 @@ fn constructor()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_into_constructors" ) ]
+#[ test ]
 fn into_constructor()
 {
 
@@ -61,7 +60,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/hset.rs b/module/core/collection_tools/tests/inc/hset.rs
index 8b8ec3d2b4..d5a0ad5ed9 100644
--- a/module/core/collection_tools/tests/inc/hset.rs
+++ b/module/core/collection_tools/tests/inc/hset.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -19,8 +18,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -38,8 +37,8 @@ fn constructor()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_into_constructors" ) ]
+#[ test ]
 fn into_constructor()
 {
 
@@ -57,7 +56,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/list.rs b/module/core/collection_tools/tests/inc/list.rs
index b89daaf6f3..648cdf8061 100644
--- a/module/core/collection_tools/tests/inc/list.rs
+++ b/module/core/collection_tools/tests/inc/list.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -12,8 +11,8 @@ fn reexport()
 
 }
 
-#[ test ]
 #[ cfg( feature = "collection_constructors" ) ]
+#[ test ]
 fn constructor()
 {
 
@@ -50,7 +49,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/vec.rs b/module/core/collection_tools/tests/inc/vec.rs
index d93062e9be..ff68b33ec8 100644
--- a/module/core/collection_tools/tests/inc/vec.rs
+++ b/module/core/collection_tools/tests/inc/vec.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -64,7 +63,6 @@ fn into_constructor()
 }
 
 // qqq : implement similar test for all containers -- done
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/inc/vecd.rs b/module/core/collection_tools/tests/inc/vecd.rs
index 7e3260fd8b..5692b56fa9 100644
--- a/module/core/collection_tools/tests/inc/vecd.rs
+++ b/module/core/collection_tools/tests/inc/vecd.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 #[ test ]
 fn reexport()
 {
@@ -50,7 +49,6 @@ fn into_constructor()
 
 }
 
-#[ cfg( any( not( feature = "no_std" ), feature = "use_alloc" ) ) ]
 #[ test ]
 fn iters()
 {
diff --git a/module/core/collection_tools/tests/tests.rs b/module/core/collection_tools/tests/tests.rs
index eb256d2f63..a36c5debec 100644
--- a/module/core/collection_tools/tests/tests.rs
+++ b/module/core/collection_tools/tests/tests.rs
@@ -10,4 +10,5 @@ use test_tools::exposed::*;
 use ::collection_tools as the_module;
 
 #[ cfg( feature = "enabled" ) ]
+#[ cfg( any( feature = "use_alloc", not( feature = "no_std" ) ) ) ]
 mod inc;