diff --git a/docs/rules/no-duplicate-keyframe-selectors.md b/docs/rules/no-duplicate-keyframe-selectors.md
index 37a8ce32..23045b17 100644
--- a/docs/rules/no-duplicate-keyframe-selectors.md
+++ b/docs/rules/no-duplicate-keyframe-selectors.md
@@ -39,6 +39,17 @@ Examples of **incorrect** code for this rule:
 	}
 }
 
+@keyframes test {
+	0%,
+	50% {
+		opacity: 0;
+	}
+
+	50% {
+		opacity: 1;
+	}
+}
+
 @keyframes test {
 	from {
 		opacity: 0;
@@ -97,6 +108,21 @@ Examples of **correct** code for this rule:
 	}
 }
 
+@keyframes test {
+	0% {
+		opacity: 0;
+	}
+
+	30%,
+	60% {
+		opacity: 0.5;
+	}
+
+	100% {
+		opacity: 1;
+	}
+}
+
 @keyframes test {
 	from {
 		opacity: 0;
diff --git a/src/rules/no-duplicate-keyframe-selectors.js b/src/rules/no-duplicate-keyframe-selectors.js
index a69cc9d4..b68b7379 100644
--- a/src/rules/no-duplicate-keyframe-selectors.js
+++ b/src/rules/no-duplicate-keyframe-selectors.js
@@ -62,37 +62,57 @@ export default /** @satisfies {DuplicateKeyframeSelectorRuleDefinition} */ ({
 				}
 
 				// @ts-ignore - children is a valid property for prelude
-				const selector = node.prelude.children[0];
+				const selectors = node.prelude.children;
 				const value = [];
 
-				selector.children.forEach(component => {
-					if (component.type === "Percentage") {
-						value.push(`${component.value}%`);
-					} else if (component.type === "TypeSelector") {
-						value.push(component.name.toLowerCase());
+				selectors.forEach(selector => {
+					const component = selector.children[0];
+					const componentType = component.type;
+
+					if (selector.children.length === 1) {
+						if (componentType === "Percentage") {
+							value.push(`${component.value}%`);
+						} else if (componentType === "TypeSelector") {
+							value.push(component.name.toLowerCase());
+						}
+					} else {
+						if (
+							selector.children.some(
+								child => child.type === "Combinator",
+							)
+						) {
+							if (
+								componentType === "TypeSelector" &&
+								selector.children[1].type === "Combinator" &&
+								selector.children[2].type === "Percentage"
+							) {
+								value.push(
+									`${component.name.toLowerCase()} ${selector.children[2].value}%`,
+								);
+							}
+						}
 					}
 				});
 
-				const selectorValue = value.join(" ");
-				const key = value
-					.map(
-						selectorPart =>
-							keyframeSelectorAliases.get(selectorPart) ??
-							selectorPart,
-					)
-					.join(" ");
-
-				if (seen.has(key)) {
-					context.report({
-						loc: selector.loc,
-						messageId: "duplicateKeyframeSelector",
-						data: {
-							selector: selectorValue,
-						},
-					});
-				} else {
-					seen.add(key);
-				}
+				const keys = value.map(
+					selectorPart =>
+						keyframeSelectorAliases.get(selectorPart) ??
+						selectorPart,
+				);
+
+				keys.forEach((key, i) => {
+					if (seen.has(key)) {
+						context.report({
+							loc: selectors[i].loc,
+							messageId: "duplicateKeyframeSelector",
+							data: {
+								selector: value[i],
+							},
+						});
+					} else {
+						seen.add(key);
+					}
+				});
 			},
 		};
 	},
diff --git a/tests/rules/no-duplicate-keyframe-selectors.test.js b/tests/rules/no-duplicate-keyframe-selectors.test.js
index 51ed68e8..272b1a6e 100644
--- a/tests/rules/no-duplicate-keyframe-selectors.test.js
+++ b/tests/rules/no-duplicate-keyframe-selectors.test.js
@@ -49,11 +49,25 @@ ruleTester.run("no-duplicate-keyframe-selectors", rule, {
             0% { opacity: 0; }
             50% { opacity: 0.5; }
             100% { opacity: 1; }
+        }`,
+		dedent`@keyframes test {
+            0%, 20% { opacity: 0; }
+            50% { opacity: 0.5; }
+            100% { opacity: 1; }
+        }`,
+		dedent`@keyframes test {
+            0%, 10%, 20% { opacity: 0; }
+            50%, 100% { opacity: 1; }
         }`,
 		dedent`@keyframes test {
             from { opacity: 0; }
             50% { opacity: 0.5; }
             to { opacity: 1; }
+        }`,
+		dedent`@keyframes test {
+            from, 30% { opacity: 0; }
+            50% { opacity: 0.5; }
+            to { opacity: 1; }
         }`,
 		dedent`@keyframes test {
         }`,
@@ -82,6 +96,16 @@ ruleTester.run("no-duplicate-keyframe-selectors", rule, {
             entry 100% { opacity: 1; }
             exit 0% { opacity: 1; }
             exit 100% { opacity: 0; }
+        }`,
+		dedent`@keyframes test {
+            entry 0%, 30% { opacity: 0; }
+            entry 100% { opacity: 1; }
+            exit 0%, 50% { opacity: 1; }
+            exit 100% { opacity: 0; }
+        }`,
+		dedent`@keyframes test {
+            entry 0%, 0% { opacity: 0; }
+            exit 100%, 100% { opacity: 1; }
         }`,
 	],
 	invalid: [
@@ -352,6 +376,85 @@ ruleTester.run("no-duplicate-keyframe-selectors", rule, {
 				},
 			],
 		},
+		{
+			code: dedent`@KEYFRAMES test {
+                0% { opacity: 0; }
+                0%, 50% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 7,
+				},
+			],
+		},
+		{
+			code: dedent`@KEYFRAMES test {
+                0%, 50% { opacity: 0; }
+                50% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "50%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 8,
+				},
+			],
+		},
+		{
+			code: dedent`@KEYFRAMES test {
+                50% { opacity: 0; }
+                0%, 50% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "50%" },
+					line: 3,
+					column: 9,
+					endLine: 3,
+					endColumn: 12,
+				},
+			],
+		},
+		{
+			code: dedent`@KEYFRAMES test {
+                0%, 50% { opacity: 0; }
+                70%, 100%, 0% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 3,
+					column: 16,
+					endLine: 3,
+					endColumn: 18,
+				},
+			],
+		},
+		{
+			code: dedent`@KEYFRAMES test {
+                0%, 0% { top: 0; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 2,
+					column: 9,
+					endLine: 2,
+					endColumn: 11,
+				},
+			],
+		},
 		{
 			code: dedent`@Keyframes test {
                 0% {
@@ -466,6 +569,117 @@ ruleTester.run("no-duplicate-keyframe-selectors", rule, {
 				},
 			],
 		},
+		{
+			code: dedent`@keyframes test {
+                entry 0% { opacity: 0; }
+                entry 0%, 50% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "entry 0%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 13,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0% { opacity: 0; }
+                50%, entry 0% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "entry 0%" },
+					line: 3,
+					column: 10,
+					endLine: 3,
+					endColumn: 18,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0% { opacity: 0; }
+                50%, 100%, entry 0% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "entry 0%" },
+					line: 3,
+					column: 16,
+					endLine: 3,
+					endColumn: 24,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0%, Entry 0% { opacity: 0; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "entry 0%" },
+					line: 2,
+					column: 15,
+					endLine: 2,
+					endColumn: 23,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0%, exit 100% { opacity: 0; }
+                exit 100% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "exit 100%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 14,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0%, exit 100% { opacity: 0; }
+                50%, 100%, exit 100% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "exit 100%" },
+					line: 3,
+					column: 16,
+					endLine: 3,
+					endColumn: 25,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                entry 0%, Exit 100% { opacity: 0; }
+                exit 100% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "exit 100%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 14,
+				},
+			],
+		},
 		{
 			code: dedent`@keyframes test {
 			    from { opacity: 0; }
@@ -544,5 +758,131 @@ ruleTester.run("no-duplicate-keyframe-selectors", rule, {
 				},
 			],
 		},
+		{
+			code: dedent`@keyframes test {
+                from, 0% { opacity: 0; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 2,
+					column: 11,
+					endLine: 2,
+					endColumn: 13,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                0%, from { opacity: 0; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "from" },
+					line: 2,
+					column: 9,
+					endLine: 2,
+					endColumn: 13,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from { opacity: 0; }
+                0%, 50% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 7,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from { opacity: 0; }
+                50%, 100%, 0% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "0%" },
+					line: 3,
+					column: 16,
+					endLine: 3,
+					endColumn: 18,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from { opacity: 0; }
+                to, 100% { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "100%" },
+					line: 3,
+					column: 9,
+					endLine: 3,
+					endColumn: 13,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from, 100% { opacity: 0; }
+                to { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "to" },
+					line: 3,
+					column: 5,
+					endLine: 3,
+					endColumn: 7,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from { opacity: 0; }
+                100%, to { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "to" },
+					line: 3,
+					column: 11,
+					endLine: 3,
+					endColumn: 13,
+				},
+			],
+		},
+		{
+			code: dedent`@keyframes test {
+                from { opacity: 0; }
+                50%, 100%, to { opacity: 1; }
+            }`,
+			errors: [
+				{
+					messageId: "duplicateKeyframeSelector",
+					data: { selector: "to" },
+					line: 3,
+					column: 16,
+					endLine: 3,
+					endColumn: 18,
+				},
+			],
+		},
 	],
 });