diff --git a/src/test/rustdoc-gui/implementors.goml b/src/test/rustdoc-gui/implementors.goml
index 87e4f2a7bd141d158b8ce9e42637a922d244475e..c9042eb4813ab8a187dfb4969ddcb8bbb8d19a76 100644
--- a/src/test/rustdoc-gui/implementors.goml
+++ b/src/test/rustdoc-gui/implementors.goml
@@ -3,14 +3,14 @@
 goto: file://|DOC_PATH|/implementors/trait.Whatever.html
 assert: "#implementors-list"
 // There are supposed to be two implementors listed.
-assert-count: ("#implementors-list > .impl", 2)
+assert-count: ("#implementors-list .impl", 2)
 // Now we check that both implementors have an anchor, an ID and a similar DOM.
-assert: ("#implementors-list > .impl:nth-child(1) > a.anchor")
-assert-attribute: ("#implementors-list > .impl:nth-child(1)", {"id": "impl-Whatever"})
-assert-attribute: ("#implementors-list > .impl:nth-child(1) > a.anchor", {"href": "#impl-Whatever"})
-assert: "#implementors-list > .impl:nth-child(1) > .code-header.in-band"
+assert: ("#implementors-list .impl:nth-child(1) > a.anchor")
+assert-attribute: ("#implementors-list .impl:nth-child(1)", {"id": "impl-Whatever"})
+assert-attribute: ("#implementors-list .impl:nth-child(1) > a.anchor", {"href": "#impl-Whatever"})
+assert: "#implementors-list .impl:nth-child(1) > .code-header.in-band"
 
-assert: ("#implementors-list > .impl:nth-child(2) > a.anchor")
-assert-attribute: ("#implementors-list > .impl:nth-child(2)", {"id": "impl-Whatever-1"})
-assert-attribute: ("#implementors-list > .impl:nth-child(2) > a.anchor", {"href": "#impl-Whatever-1"})
-assert: "#implementors-list > .impl:nth-child(2) > .code-header.in-band"
+assert: ("#implementors-list .impl:nth-child(2) > a.anchor")
+assert-attribute: ("#implementors-list .impl:nth-child(2)", {"id": "impl-Whatever-1"})
+assert-attribute: ("#implementors-list .impl:nth-child(2) > a.anchor", {"href": "#impl-Whatever-1"})
+assert: "#implementors-list .impl:nth-child(2) > .code-header.in-band"
diff --git a/src/test/rustdoc-gui/src/lib2/implementors/lib.rs b/src/test/rustdoc-gui/src/lib2/implementors/lib.rs
index 4b2f6962e30c50498ea7bdd381c8bbc77bc6c389..6417a6ac5af6de314d594cc47833508831e24a08 100644
--- a/src/test/rustdoc-gui/src/lib2/implementors/lib.rs
+++ b/src/test/rustdoc-gui/src/lib2/implementors/lib.rs
@@ -1,7 +1,11 @@
 pub trait Whatever {
+    type Foo;
+
     fn method() {}
 }
 
 pub struct Struct;
 
-impl Whatever for Struct {}
+impl Whatever for Struct {
+    type Foo = u8;
+}
diff --git a/src/test/rustdoc-gui/src/lib2/lib.rs b/src/test/rustdoc-gui/src/lib2/lib.rs
index 36373d24971c992a76d2532f0ff8dbad6ac29552..cb63a9f60022702881b01a86ac23d0299b5226f0 100644
--- a/src/test/rustdoc-gui/src/lib2/lib.rs
+++ b/src/test/rustdoc-gui/src/lib2/lib.rs
@@ -38,7 +38,9 @@ impl Trait for Foo {
 }
 
 
-impl implementors::Whatever for Foo {}
+impl implementors::Whatever for Foo {
+    type Foo = u32;
+}
 
 pub mod sub_mod {
     /// ```txt
diff --git a/src/test/rustdoc-gui/toggle-implementors.goml b/src/test/rustdoc-gui/toggle-implementors.goml
new file mode 100644
index 0000000000000000000000000000000000000000..4b2a266c7128ae1f4d7e66701c57a95dd7b10b23
--- /dev/null
+++ b/src/test/rustdoc-gui/toggle-implementors.goml
@@ -0,0 +1,13 @@
+// This test ensures two things:
+//
+// 1. The implementors toggle are not open by default.
+// 2. The "auto-collapse-implementors" setting is working as expected.
+goto: file://|DOC_PATH|/implementors/trait.Whatever.html
+
+// First, checking that they are not open by default.
+assert-attribute-false: ("#implementors-list > details", {"open": ""}, ALL)
+
+// Second, checking "auto-collapse-implementors" setting.
+local-storage: {"rustdoc-auto-collapse-implementors": false}
+reload:
+assert-attribute: ("#implementors-list > details", {"open": ""}, ALL)
diff --git a/src/test/rustdoc/trait-impl-items-links-and-anchors.rs b/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
index ddbe93febdc2526a9306312f790a1f07d7b0e04e..4d25835bf08fd231d479e4306ac9a3ed7af15af6 100644
--- a/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
+++ b/src/test/rustdoc/trait-impl-items-links-and-anchors.rs
@@ -1,6 +1,6 @@
 pub trait MyTrait {
     type Assoc;
-    const VALUE: u32;
+    const VALUE: u32 = 12;
     fn trait_function(&self);
     fn defaulted(&self) {}
     fn defaulted_override(&self) {}
@@ -38,9 +38,11 @@ fn defaulted_override(&self) {}
 }
 
 impl MyTrait for MyStruct {
+    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedtype.Assoc-3"]//a[@class="anchor"]/@href' #associatedtype.Assoc-3
     // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedtype.Assoc"]//a[@class="type"]/@href' trait.MyTrait.html#associatedtype.Assoc
     // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedtype.Assoc"]//a[@class="anchor"]/@href' #associatedtype.Assoc
     type Assoc = bool;
+    // @has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedconstant.VALUE-3"]//a[@class="anchor"]/@href' #associatedconstant.VALUE-3
     // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedconstant.VALUE"]//a[@class="constant"]/@href' trait.MyTrait.html#associatedconstant.VALUE
     // @has trait_impl_items_links_and_anchors/struct.MyStruct.html '//div[@id="associatedconstant.VALUE"]//a[@class="anchor"]/@href' #associatedconstant.VALUE
     const VALUE: u32 = 20;
@@ -55,3 +57,10 @@ fn defaulted_override(&self) {}
 }
 
 pub struct MyStruct;
+
+// We check that associated items with default values aren't generated in the implementors list.
+impl MyTrait for (u8, u8) {
+    // @!has trait_impl_items_links_and_anchors/trait.MyTrait.html '//div[@id="associatedconstant.VALUE-4"]'
+    type Assoc = bool;
+    fn trait_function(&self) {}
+}