diff --git a/tests/test_de.rs b/tests/test_de.rs
index cc865a11..3e2c8fa5 100644
--- a/tests/test_de.rs
+++ b/tests/test_de.rs
@@ -47,7 +47,7 @@ fn test_alias() {
         expected.insert(String::from("second"), 1);
         expected.insert(String::from("third"), 3);
     }
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -68,7 +68,7 @@ fn test_option() {
         b: None,
         c: Some(true),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -119,7 +119,7 @@ fn test_option_alias() {
         e: Some("x".to_owned()),
         f: Some(true),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -152,7 +152,7 @@ fn test_enum_alias() {
         a: E::A,
         b: E::B(1, 2),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -176,7 +176,7 @@ fn test_enum_tag() {
         a: E::A("foo".into()),
         b: E::B("bar".into()),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -193,7 +193,7 @@ fn test_number_as_string() {
     let expected = Num {
         value: "340282366920938463463374607431768211457".to_owned(),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 serde_if_integer128! {
@@ -204,7 +204,7 @@ serde_if_integer128! {
             ---
             -9223372036854775809
         "};
-        assert_eq!(expected, serde_yaml::from_str::<i128>(&yaml).unwrap());
+        assert_eq!(expected, serde_yaml::from_str::<i128>(yaml).unwrap());
     }
 
     #[test]
@@ -214,7 +214,7 @@ serde_if_integer128! {
             ---
             18446744073709551616
         "};
-        assert_eq!(expected, serde_yaml::from_str::<u128>(&yaml).unwrap());
+        assert_eq!(expected, serde_yaml::from_str::<u128>(yaml).unwrap());
     }
 }
 
@@ -234,7 +234,7 @@ fn test_number_alias_as_string() {
         version: "1.10".to_owned(),
         value: "1.10".to_owned(),
     };
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -262,7 +262,7 @@ fn test_de_mapping() {
         serde_yaml::Value::String("bar".to_owned()),
     );
 
-    test_de(&yaml, &expected);
+    test_de(yaml, &expected);
 }
 
 #[test]
@@ -309,7 +309,7 @@ fn test_bomb() {
         expected: "string".to_owned(),
     };
 
-    assert_eq!(expected, serde_yaml::from_str::<Data>(&yaml).unwrap());
+    assert_eq!(expected, serde_yaml::from_str::<Data>(yaml).unwrap());
 }
 
 #[test]
diff --git a/tests/test_error.rs b/tests/test_error.rs
index 41e1d037..335d2ae5 100644
--- a/tests/test_error.rs
+++ b/tests/test_error.rs
@@ -17,7 +17,7 @@ fn test_incorrect_type() {
         str
     "};
     let expected = "invalid type: string \"str\", expected i16 at line 2 column 1";
-    test_error::<i16>(&yaml, expected);
+    test_error::<i16>(yaml, expected);
 }
 
 #[test]
@@ -42,7 +42,7 @@ fn test_incorrect_nested_type() {
     "};
     let expected =
         "b[0].C.d: invalid type: string \"fase\", expected a boolean at line 4 column 10";
-    test_error::<A>(&yaml, expected);
+    test_error::<A>(yaml, expected);
 }
 
 #[test]
@@ -63,7 +63,7 @@ fn test_missing_field() {
         v: true
     "};
     let expected = "missing field `w` at line 2 column 2";
-    test_error::<Basic>(&yaml, expected);
+    test_error::<Basic>(yaml, expected);
 }
 
 #[test]
@@ -73,7 +73,7 @@ fn test_unknown_anchor() {
         *some
     "};
     let expected = "while parsing node, found unknown anchor at line 2 column 1";
-    test_error::<String>(&yaml, expected);
+    test_error::<String>(yaml, expected);
 }
 
 #[test]
@@ -88,7 +88,7 @@ fn test_ignored_unknown_anchor() {
         c: ~
     "};
     let expected = "while parsing node, found unknown anchor at line 2 column 5";
-    test_error::<Wrapper>(&yaml, expected);
+    test_error::<Wrapper>(yaml, expected);
 }
 
 #[test]
@@ -100,7 +100,7 @@ fn test_two_documents() {
         1
     "};
     let expected = "deserializing from YAML containing more than one document is not supported";
-    test_error::<usize>(&yaml, expected);
+    test_error::<usize>(yaml, expected);
 }
 
 #[test]
@@ -115,7 +115,7 @@ fn test_variant_map_wrong_size() {
         "other": 32
     "#};
     let expected = "invalid length 2, expected map containing 1 entry";
-    test_error::<E>(&yaml, expected);
+    test_error::<E>(yaml, expected);
 }
 
 #[test]
@@ -129,7 +129,7 @@ fn test_variant_not_a_map() {
         - "V"
     "#};
     let expected = "invalid type: sequence, expected string or singleton map at line 2 column 1";
-    test_error::<E>(&yaml, expected);
+    test_error::<E>(yaml, expected);
 }
 
 #[test]
@@ -143,7 +143,7 @@ fn test_variant_not_string() {
         {}: true
     "#};
     let expected = "invalid type: map, expected variant of enum `E` at line 2 column 1";
-    test_error::<E>(&yaml, expected);
+    test_error::<E>(yaml, expected);
 }
 
 #[test]
@@ -153,7 +153,7 @@ fn test_bad_bool() {
         !!bool str
     "};
     let expected = "invalid value: string \"str\", expected a boolean at line 2 column 8";
-    test_error::<bool>(&yaml, expected);
+    test_error::<bool>(yaml, expected);
 }
 
 #[test]
@@ -163,7 +163,7 @@ fn test_bad_int() {
         !!int str
     "};
     let expected = "invalid value: string \"str\", expected an integer at line 2 column 7";
-    test_error::<i64>(&yaml, expected);
+    test_error::<i64>(yaml, expected);
 }
 
 #[test]
@@ -173,7 +173,7 @@ fn test_bad_float() {
         !!float str
     "};
     let expected = "invalid value: string \"str\", expected a float at line 2 column 9";
-    test_error::<f64>(&yaml, expected);
+    test_error::<f64>(yaml, expected);
 }
 
 #[test]
@@ -183,7 +183,7 @@ fn test_bad_null() {
         !!null str
     "};
     let expected = "invalid value: string \"str\", expected null at line 2 column 8";
-    test_error::<()>(&yaml, expected);
+    test_error::<()>(yaml, expected);
 }
 
 #[test]
@@ -193,7 +193,7 @@ fn test_short_tuple() {
         [0, 0]
     "};
     let expected = "invalid length 2, expected a tuple of size 3 at line 2 column 1";
-    test_error::<(u8, u8, u8)>(&yaml, expected);
+    test_error::<(u8, u8, u8)>(yaml, expected);
 }
 
 #[test]
@@ -203,7 +203,7 @@ fn test_long_tuple() {
         [0, 0, 0]
     "};
     let expected = "invalid length 3, expected sequence of 2 elements at line 2 column 1";
-    test_error::<(u8, u8)>(&yaml, expected);
+    test_error::<(u8, u8)>(yaml, expected);
 }
 
 #[test]
diff --git a/tests/test_serde.rs b/tests/test_serde.rs
index 3f66f388..3576ae52 100644
--- a/tests/test_serde.rs
+++ b/tests/test_serde.rs
@@ -45,7 +45,7 @@ fn test_int() {
         ---
         256
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -55,7 +55,7 @@ fn test_int_max_u64() {
         ---
         18446744073709551615
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -65,7 +65,7 @@ fn test_int_min_i64() {
         ---
         -9223372036854775808
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -75,7 +75,7 @@ fn test_int_max_i64() {
         ---
         9223372036854775807
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 serde_if_integer128! {
@@ -86,7 +86,7 @@ serde_if_integer128! {
             ---
             -256
         "};
-        test_serde(&thing, &yaml);
+        test_serde(&thing, yaml);
     }
 
     #[test]
@@ -96,7 +96,7 @@ serde_if_integer128! {
             ---
             256
         "};
-        test_serde(&thing, &yaml);
+        test_serde(&thing, yaml);
     }
 }
 
@@ -107,30 +107,30 @@ fn test_float() {
         ---
         25.6
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 
     let thing = 25.;
     let yaml = indoc! {"
         ---
         25.0
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 
     let thing = f64::INFINITY;
     let yaml = indoc! {"
         ---
         .inf
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 
     let thing = f64::NEG_INFINITY;
     let yaml = indoc! {"
         ---
         -.inf
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 
-    let float: f64 = serde_yaml::from_str(&indoc! {"
+    let float: f64 = serde_yaml::from_str(indoc! {"
         ---
         .nan
     "})
@@ -147,7 +147,7 @@ fn test_vec() {
         - 2
         - 3
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -160,7 +160,7 @@ fn test_map() {
         x: 1
         y: 2
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -182,7 +182,7 @@ fn test_basic_struct() {
         y: "hi\tquoted"
         z: true
     "#};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -197,7 +197,7 @@ fn test_nested_vec() {
           - 5
           - 6
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -218,7 +218,7 @@ fn test_nested_struct() {
         inner:
           v: 512
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -230,7 +230,7 @@ fn test_option() {
         - ~
         - 3
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -241,7 +241,7 @@ fn test_unit() {
         - ~
         - ~
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -256,7 +256,7 @@ fn test_unit_variant() {
         ---
         First
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -272,7 +272,7 @@ fn test_newtype_struct() {
         ---
         v: 1
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -286,7 +286,7 @@ fn test_newtype_variant() {
         ---
         Size: 127
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -303,7 +303,7 @@ fn test_tuple_variant() {
           - 64
           - 96
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -324,7 +324,7 @@ fn test_struct_variant() {
           g: 64
           b: 96
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -359,7 +359,7 @@ fn test_value() {
           - s
           - {}
     "};
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }
 
 #[test]
@@ -389,5 +389,5 @@ fn test_mapping() {
           b: bar
     "};
 
-    test_serde(&thing, &yaml);
+    test_serde(&thing, yaml);
 }