diff --git a/spec/core_functions/function_exists.hrx b/spec/core_functions/function_exists.hrx
index f9429d46e5..f57de9f86a 100644
--- a/spec/core_functions/function_exists.hrx
+++ b/spec/core_functions/function_exists.hrx
@@ -52,6 +52,27 @@ a {
   b: true;
 }
 
+<===>
+================================================================================
+<===> through_use/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> through_use/input.scss
+@use "other" as *;
+a {b: function-exists(global-function)}
+
+<===> through_use/other.scss
+@function global-function() {@return null}
+
+<===> through_use/output.css
+a {
+  b: true;
+}
+
 <===>
 ================================================================================
 <===> non_existent/input.scss
@@ -149,3 +170,32 @@ Error: wrong number of arguments (2 for 1) for `function-exists'
 >> a {b: function-exists(foo, bar)}
 
    ------^
+
+<===>
+================================================================================
+<===> conflict/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> conflict/input.scss
+@use "other1" as *;
+@use "other2" as *;
+
+a {b: function-exists(member)}
+
+<===> conflict/other1.scss
+@function member() {@return from other1}
+
+<===> conflict/other2.scss
+@function member() {@return from other2}
+
+<===> conflict/error
+Error: Multiple global modules have a function named "member".
+  ,
+4 | a {b: function-exists(member)}
+  |       ^^^^^^^^^^^^^^^^^^^^^^^
+  '
+  /sass/spec/core_functions/function_exists/conflict/input.scss 4:7  root stylesheet
diff --git a/spec/core_functions/get_function.hrx b/spec/core_functions/get_function.hrx
index 20e2cc9456..fe83b8573e 100644
--- a/spec/core_functions/get_function.hrx
+++ b/spec/core_functions/get_function.hrx
@@ -53,6 +53,27 @@ a {
   b: 12;
 }
 
+<===>
+================================================================================
+<===> through_use/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> through_use/input.scss
+@use "other" as *;
+a {b: call(get-function(add-two), 10)}
+
+<===> through_use/other.scss
+@function add-two($v) {@return $v + 2}
+
+<===> through_use/output.css
+a {
+  b: 12;
+}
+
 <===>
 ================================================================================
 <===> plain_css/input.scss
@@ -359,3 +380,32 @@ Error: $name: get-function("add-two") is not a string.
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   '
   /sass/spec/core_functions/get_function/error/function_exists/input.scss 8:10  root stylesheet
+
+<===>
+================================================================================
+<===> conflict/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> conflict/input.scss
+@use "other1" as *;
+@use "other2" as *;
+
+a {b: get-function(member)}
+
+<===> conflict/other1.scss
+@function member() {@return from other1}
+
+<===> conflict/other2.scss
+@function member() {@return from other2}
+
+<===> conflict/error
+Error: Multiple global modules have a function named "member".
+  ,
+4 | a {b: get-function(member)}
+  |       ^^^^^^^^^^^^^^^^^^^^
+  '
+  /sass/spec/core_functions/get_function/conflict/input.scss 4:7  root stylesheet
diff --git a/spec/core_functions/global_variable_exists.hrx b/spec/core_functions/global_variable_exists.hrx
index 25d50f7846..cf60004549 100644
--- a/spec/core_functions/global_variable_exists.hrx
+++ b/spec/core_functions/global_variable_exists.hrx
@@ -35,6 +35,27 @@ a {
   b: true;
 }
 
+<===>
+================================================================================
+<===> through_use/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> through_use/input.scss
+@use "other" as *;
+a {b: global-variable-exists(global-variable)}
+
+<===> through_use/other.scss
+$global-variable: null;
+
+<===> through_use/output.css
+a {
+  b: true;
+}
+
 <===>
 ================================================================================
 <===> dash_insensitive/input.scss
@@ -144,3 +165,32 @@ Error: wrong number of arguments (2 for 1) for `global-variable-exists'
 >> a {b: global-variable-exists(foo, bar)}
 
    ------^
+
+<===>
+================================================================================
+<===> conflict/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> conflict/input.scss
+@use "other1" as *;
+@use "other2" as *;
+
+a {b: global-variable-exists(member)}
+
+<===> conflict/other1.scss
+$member: from other1;
+
+<===> conflict/other2.scss
+$member: from other2;
+
+<===> conflict/error
+Error: Multiple global modules have a variable named "$member".
+  ,
+4 | a {b: global-variable-exists(member)}
+  |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  '
+  /sass/spec/core_functions/global_variable_exists/conflict/input.scss 4:7  root stylesheet
diff --git a/spec/core_functions/mixin_exists.hrx b/spec/core_functions/mixin_exists.hrx
index bbe8fa47fe..835aebd605 100644
--- a/spec/core_functions/mixin_exists.hrx
+++ b/spec/core_functions/mixin_exists.hrx
@@ -41,6 +41,13 @@ a {
 
 <===>
 ================================================================================
+<===> through_import/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
 <===> through_import/input.scss
 @import "other";
 a {b: mixin-exists(global-mixin)}
@@ -53,6 +60,20 @@ a {
   b: true;
 }
 
+<===>
+================================================================================
+<===> through_use/input.scss
+@use "other" as *;
+a {b: mixin-exists(global-mixin)}
+
+<===> through_use/other.scss
+@mixin global-mixin() {}
+
+<===> through_use/output.css
+a {
+  b: true;
+}
+
 <===>
 ================================================================================
 <===> non_existent/input.scss
@@ -150,3 +171,32 @@ Error: wrong number of arguments (2 for 1) for `mixin-exists'
 >> a {b: mixin-exists(foo, bar)}
 
    ------^
+
+<===>
+================================================================================
+<===> conflict/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> conflict/input.scss
+@use "other1" as *;
+@use "other2" as *;
+
+a {b: mixin-exists(member)}
+
+<===> conflict/other1.scss
+@mixin member() {}
+
+<===> conflict/other2.scss
+@mixin member() {}
+
+<===> conflict/error
+Error: Multiple global modules have a mixin named "member".
+  ,
+4 | a {b: mixin-exists(member)}
+  |       ^^^^^^^^^^^^^^^^^^^^
+  '
+  /sass/spec/core_functions/mixin_exists/conflict/input.scss 4:7  root stylesheet
diff --git a/spec/core_functions/variable_exists.hrx b/spec/core_functions/variable_exists.hrx
index babb9411f5..6dee884098 100644
--- a/spec/core_functions/variable_exists.hrx
+++ b/spec/core_functions/variable_exists.hrx
@@ -35,6 +35,27 @@ a {
   b: true;
 }
 
+<===>
+================================================================================
+<===> through_use/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> through_use/input.scss
+@use "other" as *;
+a {b: variable-exists(global-variable)}
+
+<===> through_use/other.scss
+$global-variable: null;
+
+<===> through_use/output.css
+a {
+  b: true;
+}
+
 <===>
 ================================================================================
 <===> dash_insensitive/input.scss
@@ -144,3 +165,32 @@ Error: wrong number of arguments (2 for 1) for `variable-exists'
 >> a {b: variable-exists(foo, bar)}
 
    ------^
+
+<===>
+================================================================================
+<===> conflict/options.yml
+---
+:todo:
+- libsass # sass/libsass#2807
+:ignore_for:
+- ruby-sass
+
+<===> conflict/input.scss
+@use "other1" as *;
+@use "other2" as *;
+
+a {b: variable-exists(member)}
+
+<===> conflict/other1.scss
+$member: from other1;
+
+<===> conflict/other2.scss
+$member: from other2;
+
+<===> conflict/error
+Error: Multiple global modules have a variable named "$member".
+  ,
+4 | a {b: variable-exists(member)}
+  |       ^^^^^^^^^^^^^^^^^^^^^^^
+  '
+  /sass/spec/core_functions/variable_exists/conflict/input.scss 4:7  root stylesheet