diff --git a/lib/rules/key-spacing.js b/lib/rules/key-spacing.js
index 5aced89a68e..994c35627f7 100644
--- a/lib/rules/key-spacing.js
+++ b/lib/rules/key-spacing.js
@@ -42,30 +42,6 @@ function isSingleLine(node) {
     return (node.loc.end.line === node.loc.start.line);
 }
 
-/**
- * Checks whether both nodes are on the same line.
- * @param {ASTNode} nodeA AST Node being evaluated.
- * @param {ASTNode} nodeB AST Node being evaluated.
- * @returns {boolean} True if both nodes are on the same line.
- */
-function isOnSameLine(nodeA, nodeB) {
-    return (nodeA.loc.end.line === nodeB.loc.end.line);
-}
-
-/**
- * Checks whether the properties of a node on the same line.
- * @param {ASTNode} node node
- * @returns {boolean} True if the properties of a node are on the same line.
- */
-function isPropertiesOnSameLine(node) {
-    if (node.properties.length <= 1) {
-        return true;
-    }
-    const [firstProperty] = node.properties;
-
-    return node.properties.every(property => isOnSameLine(firstProperty, property));
-}
-
 /**
  * Initializes a single option property from the configuration with defaults for undefined values
  * @param {Object} toOptions Object to be initialized
@@ -654,7 +630,7 @@ module.exports = {
 
             return {
                 ObjectExpression(node) {
-                    if (isSingleLine(node) || isPropertiesOnSameLine(node)) {
+                    if (isSingleLine(node)) {
                         verifyListSpacing(node.properties.filter(isKeyValueProperty));
                     } else {
                         verifyAlignment(node);
@@ -667,9 +643,7 @@ module.exports = {
         // Obey beforeColon and afterColon in each property as configured
         return {
             Property(node) {
-                const option = (isSingleLine(node.parent) || isPropertiesOnSameLine(node.parent)) ? singleLineOptions : multiLineOptions;
-
-                verifySpacing(node, option);
+                verifySpacing(node, isSingleLine(node.parent) ? singleLineOptions : multiLineOptions);
             }
         };
 
diff --git a/tests/lib/rules/key-spacing.js b/tests/lib/rules/key-spacing.js
index 9225f8b8cc4..a9ed533741c 100644
--- a/tests/lib/rules/key-spacing.js
+++ b/tests/lib/rules/key-spacing.js
@@ -384,214 +384,6 @@ ruleTester.run("key-spacing", rule, {
         }],
         parserOptions: { ecmaVersion: 2018 }
     },
-    {
-        code: [
-            "({",
-            "    foo : 1, bar : 2, baz : 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: true
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: false
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            afterColon: true
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo:1, bar:2, baz:3",
-            "});"
-        ].join("\n"),
-        options: [{
-            afterColon: false
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo :1, bar :2, baz :3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: true,
-            afterColon: false
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: false,
-            afterColon: true
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo : 1, bar : 2, baz : 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: true,
-            afterColon: true
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo:1, bar:2, baz:3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: false,
-            afterColon: false
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            mode: "strict"
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo:  1, bar:  2, baz:  3",
-            "});"
-        ].join("\n"),
-        options: [{
-            mode: "minimum"
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            singleLine: {
-                afterColon: true,
-                beforeColon: false
-            }
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo :1, bar :2, baz :3",
-            "});"
-        ].join("\n"),
-        options: [{
-            singleLine: {
-                afterColon: false,
-                beforeColon: true
-            }
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 'bar',",
-            "});"
-        ].join("\n"),
-        options: [{
-            multiLine: {
-                align: "value"
-            }
-        }]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            multiLine: {
-                align: "value"
-            }
-        }]
-    },
-    {
-        code: [
-            "({",
-            "  foo: 1, bar: { qux: 4",
-            "  }, baz: 3,",
-            "})"
-        ].join("\n"),
-        options: [
-            {
-                singleLine: {
-                    afterColon: true,
-                    beforeColon: false
-                },
-                multiLine: {
-                    align: "value"
-                }
-            }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "  foo: 1, bar: { qux1: 4, qux2: 5",
-            "  }, baz: 3,",
-            "})"
-        ].join("\n"),
-        options: [
-            {
-                singleLine: {
-                    afterColon: true,
-                    beforeColon: false
-                },
-                multiLine: {
-                    align: "value"
-                }
-            }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "  foo: 1, bar: {",
-            "    qux1: 4, qux2: 5",
-            "  }, baz: 3,",
-            "})"
-        ].join("\n"),
-        options: [
-            {
-                multiLine: {
-                    align: "value"
-                }
-            }
-        ]
-    },
 
     // https://github.com/eslint/eslint/issues/4792
     {
@@ -1977,218 +1769,5 @@ ruleTester.run("key-spacing", rule, {
             { messageId: "missingKey", data: { computed: "", key: "foo" }, line: 1, column: 7, type: "Identifier" },
             { messageId: "missingValue", data: { computed: "", key: "foo" }, line: 1, column: 19, type: "Identifier" }
         ]
-    },
-    {
-        code: [
-            "({",
-            "    foo : 1, bar : 2, baz : 3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: false
-        }],
-        errors: [
-            { messageId: "extraKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "extraKey", data: { computed: "", key: "bar" }, line: 2, column: 14, type: "Identifier" },
-            { messageId: "extraKey", data: { computed: "", key: "baz" }, line: 2, column: 23, type: "Identifier" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo : 1, bar : 2, baz : 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: true
-        }],
-        errors: [
-            { messageId: "missingKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "missingKey", data: { computed: "", key: "bar" }, line: 2, column: 13, type: "Identifier" },
-            { messageId: "missingKey", data: { computed: "", key: "baz" }, line: 2, column: 21, type: "Identifier" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo:1, bar:2, baz:3",
-            "});"
-        ].join("\n"),
-        options: [{
-            afterColon: false
-        }],
-        errors: [
-            { messageId: "extraValue", data: { computed: "", key: "foo" }, line: 2, column: 10, type: "Literal" },
-            { messageId: "extraValue", data: { computed: "", key: "bar" }, line: 2, column: 18, type: "Literal" },
-            { messageId: "extraValue", data: { computed: "", key: "baz" }, line: 2, column: 26, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo:1, bar:2, baz:3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            afterColon: true
-        }],
-        errors: [
-            { messageId: "missingValue", data: { computed: "", key: "foo" }, line: 2, column: 9, type: "Literal" },
-            { messageId: "missingValue", data: { computed: "", key: "bar" }, line: 2, column: 16, type: "Literal" },
-            { messageId: "missingValue", data: { computed: "", key: "baz" }, line: 2, column: 23, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo :1, bar :2, baz :3",
-            "});"
-        ].join("\n"),
-        options: [{
-            beforeColon: true,
-            afterColon: false
-        }],
-        errors: [
-            { messageId: "missingKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "foo" }, line: 2, column: 10, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "bar" }, line: 2, column: 13, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "bar" }, line: 2, column: 18, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "baz" }, line: 2, column: 21, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "baz" }, line: 2, column: 26, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo :1, bar :2, baz :3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            mode: "strict"
-        }],
-        errors: [
-            { messageId: "extraKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "foo" }, line: 2, column: 10, type: "Literal" },
-            { messageId: "extraKey", data: { computed: "", key: "bar" }, line: 2, column: 13, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "bar" }, line: 2, column: 18, type: "Literal" },
-            { messageId: "extraKey", data: { computed: "", key: "baz" }, line: 2, column: 21, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "baz" }, line: 2, column: 26, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo :1, bar :2, baz :3",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo: 1, bar: 2, baz: 3",
-            "});"
-        ].join("\n"),
-        options: [{
-            mode: "minimum"
-        }],
-        errors: [
-            { messageId: "extraKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "foo" }, line: 2, column: 10, type: "Literal" },
-            { messageId: "extraKey", data: { computed: "", key: "bar" }, line: 2, column: 13, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "bar" }, line: 2, column: 18, type: "Literal" },
-            { messageId: "extraKey", data: { computed: "", key: "baz" }, line: 2, column: 21, type: "Identifier" },
-            { messageId: "missingValue", data: { computed: "", key: "baz" }, line: 2, column: 26, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "    foo: 1, bar: 2,",
-            "});"
-        ].join("\n"),
-        output: [
-            "({",
-            "    foo :1, bar :2,",
-            "});"
-        ].join("\n"),
-        options: [{
-            singleLine: {
-                beforeColon: true,
-                afterColon: false
-            }
-        }],
-        errors: [
-            { messageId: "missingKey", data: { computed: "", key: "foo" }, line: 2, column: 5, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "foo" }, line: 2, column: 10, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "bar" }, line: 2, column: 13, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "bar" }, line: 2, column: 18, type: "Literal" }
-        ]
-    },
-    {
-        code: [
-            "({",
-            "  foo: 1, bar: { qux1: 4, qux2: 5",
-            "  }, baz: 3,",
-            "})"
-        ].join("\n"),
-        output: [
-            "({",
-            "  foo :1, bar :{ qux1 :4, qux2 :5",
-            "  }, baz :3,",
-            "})"
-        ].join("\n"),
-        options: [
-            {
-                singleLine: {
-                    afterColon: false,
-                    beforeColon: true
-                },
-                multiLine: {
-                    align: "value",
-                    afterColon: false,
-                    beforeColon: true
-                }
-            }
-        ],
-        errors: [
-            { messageId: "missingKey", data: { computed: "", key: "foo" }, line: 2, column: 3, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "foo" }, line: 2, column: 8, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "bar" }, line: 2, column: 11, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "bar" }, line: 2, column: 16, type: "ObjectExpression" },
-            { messageId: "missingKey", data: { computed: "", key: "qux1" }, line: 2, column: 18, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "qux1" }, line: 2, column: 24, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "qux2" }, line: 2, column: 27, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "qux2" }, line: 2, column: 33, type: "Literal" },
-            { messageId: "missingKey", data: { computed: "", key: "baz" }, line: 3, column: 6, type: "Identifier" },
-            { messageId: "extraValue", data: { computed: "", key: "baz" }, line: 3, column: 11, type: "Literal" }
-        ]
     }]
 });