diff --git a/library/core/src/fmt/builders.rs b/library/core/src/fmt/builders.rs
index 4ccb585862c..944f7c08507 100644
--- a/library/core/src/fmt/builders.rs
+++ b/library/core/src/fmt/builders.rs
@@ -78,7 +78,7 @@ fn write_char(&mut self, c: char) -> fmt::Result {
 ///
 /// assert_eq!(
 ///     format!("{:?}", Foo { bar: 10, baz: "Hello World".to_string() }),
-///     "Foo { bar: 10, baz: \"Hello World\" }",
+///     r#"Foo { bar: 10, baz: "Hello World" }"#,
 /// );
 /// ```
 #[must_use = "must eventually call `finish()` on Debug builders"]
@@ -125,7 +125,7 @@ impl<'a, 'b: 'a> DebugStruct<'a, 'b> {
     ///
     /// assert_eq!(
     ///     format!("{:?}", Bar { bar: 10, another: "Hello World".to_string() }),
-    ///     "Bar { bar: 10, another: \"Hello World\", nonexistent_field: 1 }",
+    ///     r#"Bar { bar: 10, another: "Hello World", nonexistent_field: 1 }"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -237,7 +237,7 @@ pub fn finish_non_exhaustive(&mut self) -> fmt::Result {
     ///
     /// assert_eq!(
     ///     format!("{:?}", Bar { bar: 10, baz: "Hello World".to_string() }),
-    ///     "Bar { bar: 10, baz: \"Hello World\" }",
+    ///     r#"Bar { bar: 10, baz: "Hello World" }"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -280,7 +280,7 @@ fn is_pretty(&self) -> bool {
 ///
 /// assert_eq!(
 ///     format!("{:?}", Foo(10, "Hello World".to_string())),
-///     "Foo(10, \"Hello World\")",
+///     r#"Foo(10, "Hello World")"#,
 /// );
 /// ```
 #[must_use = "must eventually call `finish()` on Debug builders"]
@@ -322,7 +322,7 @@ impl<'a, 'b: 'a> DebugTuple<'a, 'b> {
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(10, "Hello World".to_string())),
-    ///     "Foo(10, \"Hello World\")",
+    ///     r#"Foo(10, "Hello World")"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -381,7 +381,7 @@ pub fn field_with<F>(&mut self, value_fmt: F) -> &mut Self
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(10, "Hello World".to_string())),
-    ///     "Foo(10, \"Hello World\")",
+    ///     r#"Foo(10, "Hello World")"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -747,7 +747,7 @@ pub fn finish(&mut self) -> fmt::Result {
 ///
 /// assert_eq!(
 ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-///     "{\"A\": 10, \"B\": 11}",
+///     r#"{"A": 10, "B": 11}"#,
 /// );
 /// ```
 #[must_use = "must eventually call `finish()` on Debug builders"]
@@ -787,7 +787,7 @@ impl<'a, 'b: 'a> DebugMap<'a, 'b> {
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-    ///     "{\"whole\": [(\"A\", 10), (\"B\", 11)]}",
+    ///     r#"{"whole": [("A", 10), ("B", 11)]}"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -823,7 +823,7 @@ pub fn entry(&mut self, key: &dyn fmt::Debug, value: &dyn fmt::Debug) -> &mut Se
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-    ///     "{\"whole\": [(\"A\", 10), (\"B\", 11)]}",
+    ///     r#"{"whole": [("A", 10), ("B", 11)]}"#,
     /// );
     /// ```
     #[stable(feature = "debug_map_key_value", since = "1.42.0")]
@@ -899,7 +899,7 @@ pub fn key_with<F>(&mut self, key_fmt: F) -> &mut Self
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-    ///     "{\"whole\": [(\"A\", 10), (\"B\", 11)]}",
+    ///     r#"{"whole": [("A", 10), ("B", 11)]}"#,
     /// );
     /// ```
     #[stable(feature = "debug_map_key_value", since = "1.42.0")]
@@ -957,7 +957,7 @@ pub fn value_with<F>(&mut self, value_fmt: F) -> &mut Self
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-    ///     "{\"A\": 10, \"B\": 11}",
+    ///     r#"{"A": 10, "B": 11}"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
@@ -997,7 +997,7 @@ pub fn entries<K, V, I>(&mut self, entries: I) -> &mut Self
     ///
     /// assert_eq!(
     ///     format!("{:?}", Foo(vec![("A".to_string(), 10), ("B".to_string(), 11)])),
-    ///     "{\"A\": 10, \"B\": 11}",
+    ///     r#"{"A": 10, "B": 11}"#,
     /// );
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
diff --git a/library/core/tests/fmt/builders.rs b/library/core/tests/fmt/builders.rs
index 2bdc334b7c0..7b73f138151 100644
--- a/library/core/tests/fmt/builders.rs
+++ b/library/core/tests/fmt/builders.rs
@@ -79,23 +79,23 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         }
 
         assert_eq!(
-            "Bar { foo: Foo { bar: true, baz: 10/20 }, hello: \"world\" }",
+            r#"Bar { foo: Foo { bar: true, baz: 10/20 }, hello: "world" }"#,
             format!("{Bar:?}")
         );
         assert_eq!(
-            "Bar {
+            r#"Bar {
     foo: Foo {
         bar: true,
         baz: 10/20,
     },
-    hello: \"world\",
-}",
+    hello: "world",
+}"#,
             format!("{Bar:#?}")
         );
     }
 
     #[test]
-    fn test_only_non_exhaustive() {
+    fn test_empty_non_exhaustive() {
         struct Foo;
 
         impl fmt::Debug for Foo {
@@ -157,19 +157,19 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         }
 
         assert_eq!(
-            "Bar { foo: Foo { bar: true, baz: 10/20, .. }, hello: \"world\", .. }",
+            r#"Bar { foo: Foo { bar: true, baz: 10/20, .. }, hello: "world", .. }"#,
             format!("{Bar:?}")
         );
         assert_eq!(
-            "Bar {
+            r#"Bar {
     foo: Foo {
         bar: true,
         baz: 10/20,
         ..
     },
-    hello: \"world\",
+    hello: "world",
     ..
-}",
+}"#,
             format!("{Bar:#?}")
         );
     }
@@ -249,15 +249,15 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
             }
         }
 
-        assert_eq!("Bar(Foo(true, 10/20), \"world\")", format!("{Bar:?}"));
+        assert_eq!(r#"Bar(Foo(true, 10/20), "world")"#, format!("{Bar:?}"));
         assert_eq!(
-            "Bar(
+            r#"Bar(
     Foo(
         true,
         10/20,
     ),
-    \"world\",
-)",
+    "world",
+)"#,
             format!("{Bar:#?}")
         );
     }
@@ -301,11 +301,11 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         assert_eq!(format!("{Entry:?}"), format!("{KeyValue:?}"));
         assert_eq!(format!("{Entry:#?}"), format!("{KeyValue:#?}"));
 
-        assert_eq!("{\"bar\": true}", format!("{Entry:?}"));
+        assert_eq!(r#"{"bar": true}"#, format!("{Entry:?}"));
         assert_eq!(
-            "{
-    \"bar\": true,
-}",
+            r#"{
+    "bar": true,
+}"#,
             format!("{Entry:#?}")
         );
     }
@@ -339,12 +339,12 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         assert_eq!(format!("{Entry:?}"), format!("{KeyValue:?}"));
         assert_eq!(format!("{Entry:#?}"), format!("{KeyValue:#?}"));
 
-        assert_eq!("{\"bar\": true, 10: 10/20}", format!("{Entry:?}"));
+        assert_eq!(r#"{"bar": true, 10: 10/20}"#, format!("{Entry:?}"));
         assert_eq!(
-            "{
-    \"bar\": true,
+            r#"{
+    "bar": true,
     10: 10/20,
-}",
+}"#,
             format!("{Entry:#?}")
         );
     }
@@ -371,21 +371,21 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         }
 
         assert_eq!(
-            "{\"foo\": {\"bar\": true, 10: 10/20}, \
-                    {\"bar\": true, 10: 10/20}: \"world\"}",
+            r#"{"foo": {"bar": true, 10: 10/20}, \
+                    {"bar": true, 10: 10/20}: "world"}"#,
             format!("{Bar:?}")
         );
         assert_eq!(
-            "{
-    \"foo\": {
-        \"bar\": true,
+            r#"{
+    "foo": {
+        "bar": true,
         10: 10/20,
     },
     {
-        \"bar\": true,
+        "bar": true,
         10: 10/20,
-    }: \"world\",
-}",
+    }: "world",
+}"#,
             format!("{Bar:#?}")
         );
     }
@@ -547,15 +547,15 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
             }
         }
 
-        assert_eq!("{{true, 10/20}, \"world\"}", format!("{Bar:?}"));
+        assert_eq!(r#"{{true, 10/20}, "world"}"#, format!("{Bar:?}"));
         assert_eq!(
-            "{
+            r#"{
     {
         true,
         10/20,
     },
-    \"world\",
-}",
+    "world",
+}"#,
             format!("{Bar:#?}")
         );
     }
@@ -635,15 +635,15 @@ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
             }
         }
 
-        assert_eq!("[[true, 10/20], \"world\"]", format!("{Bar:?}"));
+        assert_eq!(r#"[[true, 10/20], "world"]"#, format!("{Bar:?}"));
         assert_eq!(
-            "[
+            r#"[
     [
         true,
         10/20,
     ],
-    \"world\",
-]",
+    "world",
+]"#,
             format!("{Bar:#?}")
         );
     }