diff --git a/crates/ra_ide/src/completion/complete_trait_impl.rs b/crates/ra_ide/src/completion/complete_trait_impl.rs
index 23e42928dd6..a610fd6d167 100644
--- a/crates/ra_ide/src/completion/complete_trait_impl.rs
+++ b/crates/ra_ide/src/completion/complete_trait_impl.rs
@@ -227,330 +227,264 @@ fn make_const_compl_syntax(const_: &ast::ConstDef) -> String {
 
 #[cfg(test)]
 mod tests {
-    use insta::assert_debug_snapshot;
+    use expect::{expect, Expect};
 
-    use crate::completion::{test_utils::do_completion, CompletionItem, CompletionKind};
+    use crate::completion::{
+        test_utils::{check_edit, completion_list},
+        CompletionKind,
+    };
 
-    fn complete(code: &str) -> Vec<CompletionItem> {
-        do_completion(code, CompletionKind::Magic)
+    fn check(ra_fixture: &str, expect: Expect) {
+        let actual = completion_list(ra_fixture, CompletionKind::Magic);
+        expect.assert_eq(&actual)
     }
 
     #[test]
     fn name_ref_function_type_const() {
-        let completions = complete(
-            r"
-            trait Test {
-                type TestType;
-                const TEST_CONST: u16;
-                fn test();
-            }
+        check(
+            r#"
+trait Test {
+    type TestType;
+    const TEST_CONST: u16;
+    fn test();
+}
+struct T;
 
-            struct T1;
-
-            impl Test for T1 {
-                t<|>
-            }
-            ",
+impl Test for T {
+    t<|>
+}
+"#,
+            expect![["
+ct const TEST_CONST: u16 = \n\
+fn fn test()
+ta type TestType = \n\
+            "]],
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "const TEST_CONST: u16 = ",
-                source_range: 112..113,
-                delete: 112..113,
-                insert: "const TEST_CONST: u16 = ",
-                kind: Const,
-                lookup: "TEST_CONST",
-            },
-            CompletionItem {
-                label: "fn test()",
-                source_range: 112..113,
-                delete: 112..113,
-                insert: "fn test() {\n    $0\n}",
-                kind: Function,
-                lookup: "test",
-            },
-            CompletionItem {
-                label: "type TestType = ",
-                source_range: 112..113,
-                delete: 112..113,
-                insert: "type TestType = ",
-                kind: TypeAlias,
-                lookup: "TestType",
-            },
-        ]
-        "###);
     }
 
     #[test]
     fn no_nested_fn_completions() {
-        let completions = complete(
+        check(
             r"
-            trait Test {
-                fn test();
-                fn test2();
-            }
+trait Test {
+    fn test();
+    fn test2();
+}
+struct T;
 
-            struct T1;
-
-            impl Test for T1 {
-                fn test() {
-                    t<|>
-                }
-            }
-            ",
+impl Test for T {
+    fn test() {
+        t<|>
+    }
+}
+",
+            expect![[""]],
         );
-        assert_debug_snapshot!(completions, @r###"[]"###);
     }
 
     #[test]
     fn name_ref_single_function() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn test();
-            }
+        check_edit(
+            "test",
+            r#"
+trait Test {
+    fn test();
+}
+struct T;
 
-            struct T1;
+impl Test for T {
+    t<|>
+}
+"#,
+            r#"
+trait Test {
+    fn test();
+}
+struct T;
 
-            impl Test for T1 {
-                t<|>
-            }
-            ",
+impl Test for T {
+    fn test() {
+    $0
+}
+}
+"#,
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "fn test()",
-                source_range: 66..67,
-                delete: 66..67,
-                insert: "fn test() {\n    $0\n}",
-                kind: Function,
-                lookup: "test",
-            },
-        ]
-        "###);
     }
 
     #[test]
     fn single_function() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn foo();
-            }
+        check_edit(
+            "test",
+            r#"
+trait Test {
+    fn test();
+}
+struct T;
 
-            struct T1;
+impl Test for T {
+    fn t<|>
+}
+"#,
+            r#"
+trait Test {
+    fn test();
+}
+struct T;
 
-            impl Test for T1 {
-                fn f<|>
-            }
-            ",
+impl Test for T {
+    fn test() {
+    $0
+}
+}
+"#,
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "fn foo()",
-                source_range: 68..69,
-                delete: 65..69,
-                insert: "fn foo() {\n    $0\n}",
-                kind: Function,
-                lookup: "foo",
-            },
-        ]
-        "###);
     }
 
     #[test]
     fn hide_implemented_fn() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn foo();
-                fn foo_bar();
-            }
+        check(
+            r#"
+trait Test {
+    fn foo();
+    fn foo_bar();
+}
+struct T;
 
-            struct T1;
-
-            impl Test for T1 {
-                fn foo() {}
-
-                fn f<|>
-            }
-            ",
+impl Test for T {
+    fn foo() {}
+    fn f<|>
+}
+"#,
+            expect![[r#"
+                fn fn foo_bar()
+            "#]],
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "fn foo_bar()",
-                source_range: 103..104,
-                delete: 100..104,
-                insert: "fn foo_bar() {\n    $0\n}",
-                kind: Function,
-                lookup: "foo_bar",
-            },
-        ]
-        "###);
-    }
-
-    #[test]
-    fn completes_only_on_top_level() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn foo();
-
-                fn foo_bar();
-            }
-
-            struct T1;
-
-            impl Test for T1 {
-                fn foo() {
-                    <|>
-                }
-            }
-            ",
-        );
-        assert_debug_snapshot!(completions, @r###"[]"###);
     }
 
     #[test]
     fn generic_fn() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn foo<T>();
-            }
+        check_edit(
+            "foo",
+            r#"
+trait Test {
+    fn foo<T>();
+}
+struct T;
 
-            struct T1;
+impl Test for T {
+    fn f<|>
+}
+"#,
+            r#"
+trait Test {
+    fn foo<T>();
+}
+struct T;
 
-            impl Test for T1 {
-                fn f<|>
-            }
-            ",
+impl Test for T {
+    fn foo<T>() {
+    $0
+}
+}
+"#,
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "fn foo()",
-                source_range: 71..72,
-                delete: 68..72,
-                insert: "fn foo<T>() {\n    $0\n}",
-                kind: Function,
-                lookup: "foo",
-            },
-        ]
-        "###);
-    }
+        check_edit(
+            "foo",
+            r#"
+trait Test {
+    fn foo<T>() where T: Into<String>;
+}
+struct T;
 
-    #[test]
-    fn generic_constrait_fn() {
-        let completions = complete(
-            r"
-            trait Test {
-                fn foo<T>() where T: Into<String>;
-            }
+impl Test for T {
+    fn f<|>
+}
+"#,
+            r#"
+trait Test {
+    fn foo<T>() where T: Into<String>;
+}
+struct T;
 
-            struct T1;
-
-            impl Test for T1 {
-                fn f<|>
-            }
-            ",
+impl Test for T {
+    fn foo<T>()
+where T: Into<String> {
+    $0
+}
+}
+"#,
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "fn foo()",
-                source_range: 93..94,
-                delete: 90..94,
-                insert: "fn foo<T>()\nwhere T: Into<String> {\n    $0\n}",
-                kind: Function,
-                lookup: "foo",
-            },
-        ]
-        "###);
     }
 
     #[test]
     fn associated_type() {
-        let completions = complete(
-            r"
-            trait Test {
-                type SomeType;
-            }
+        check_edit(
+            "SomeType",
+            r#"
+trait Test {
+    type SomeType;
+}
 
-            impl Test for () {
-                type S<|>
-            }
-            ",
+impl Test for () {
+    type S<|>
+}
+"#,
+            "
+trait Test {
+    type SomeType;
+}
+
+impl Test for () {
+    type SomeType = \n\
+}
+",
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "type SomeType = ",
-                source_range: 63..64,
-                delete: 58..64,
-                insert: "type SomeType = ",
-                kind: TypeAlias,
-                lookup: "SomeType",
-            },
-        ]
-        "###);
     }
 
     #[test]
     fn associated_const() {
-        let completions = complete(
-            r"
-            trait Test {
-                const SOME_CONST: u16;
-            }
+        check_edit(
+            "SOME_CONST",
+            r#"
+trait Test {
+    const SOME_CONST: u16;
+}
 
-            impl Test for () {
-                const S<|>
-            }
-            ",
+impl Test for () {
+    const S<|>
+}
+"#,
+            "
+trait Test {
+    const SOME_CONST: u16;
+}
+
+impl Test for () {
+    const SOME_CONST: u16 = \n\
+}
+",
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "const SOME_CONST: u16 = ",
-                source_range: 72..73,
-                delete: 66..73,
-                insert: "const SOME_CONST: u16 = ",
-                kind: Const,
-                lookup: "SOME_CONST",
-            },
-        ]
-        "###);
-    }
 
-    #[test]
-    fn associated_const_with_default() {
-        let completions = complete(
-            r"
-            trait Test {
-                const SOME_CONST: u16 = 42;
-            }
+        check_edit(
+            "SOME_CONST",
+            r#"
+trait Test {
+    const SOME_CONST: u16 = 92;
+}
 
-            impl Test for () {
-                const S<|>
-            }
-            ",
+impl Test for () {
+    const S<|>
+}
+"#,
+            "
+trait Test {
+    const SOME_CONST: u16 = 92;
+}
+
+impl Test for () {
+    const SOME_CONST: u16 = \n\
+}
+",
         );
-        assert_debug_snapshot!(completions, @r###"
-        [
-            CompletionItem {
-                label: "const SOME_CONST: u16 = ",
-                source_range: 77..78,
-                delete: 71..78,
-                insert: "const SOME_CONST: u16 = ",
-                kind: Const,
-                lookup: "SOME_CONST",
-            },
-        ]
-        "###);
     }
 }