diff --git a/documentation/src/docs/asciidoc/release-notes/release-notes-5.8.1.adoc b/documentation/src/docs/asciidoc/release-notes/release-notes-5.8.1.adoc
index e4d047f44654..7a150b4359b0 100644
--- a/documentation/src/docs/asciidoc/release-notes/release-notes-5.8.1.adoc
+++ b/documentation/src/docs/asciidoc/release-notes/release-notes-5.8.1.adoc
@@ -39,7 +39,7 @@ GitHub.
 
 ==== New Features and Improvements
 
-* ❓
+* `JAVA_18` has been added to the `JRE` enum for use with JRE-based execution conditions.
 
 
 [[release-notes-5.8.1-junit-vintage]]
diff --git a/junit-jupiter-api/src/main/java/org/junit/jupiter/api/condition/JRE.java b/junit-jupiter-api/src/main/java/org/junit/jupiter/api/condition/JRE.java
index 200a2df181c6..ba5169de9dbd 100644
--- a/junit-jupiter-api/src/main/java/org/junit/jupiter/api/condition/JRE.java
+++ b/junit-jupiter-api/src/main/java/org/junit/jupiter/api/condition/JRE.java
@@ -114,11 +114,19 @@ public enum JRE {
 	@API(status = STABLE, since = "5.7.1")
 	JAVA_17,
 
+	/**
+	 * Java 18.
+	 *
+	 * @since 5.8.1
+	 */
+	@API(status = STABLE, since = "5.8.1")
+	JAVA_18,
+
 	/**
 	 * A JRE version other than {@link #JAVA_8}, {@link #JAVA_9},
 	 * {@link #JAVA_10}, {@link #JAVA_11}, {@link #JAVA_12},
 	 * {@link #JAVA_13}, {@link #JAVA_14}, {@link #JAVA_15},
-	 * {@link #JAVA_16}, or {@link #JAVA_17}.
+	 * {@link #JAVA_16}, {@link #JAVA_17}, or {@link #JAVA_18}.
 	 */
 	OTHER;
 
@@ -166,6 +174,8 @@ private static JRE determineCurrentVersion() {
 					return JAVA_16;
 				case 17:
 					return JAVA_17;
+				case 18:
+					return JAVA_18;
 				default:
 					return OTHER;
 			}
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeConditionTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeConditionTests.java
index 3cc2162017b0..d8bc38de16ea 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeConditionTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeConditionTests.java
@@ -19,6 +19,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 
@@ -119,7 +120,7 @@ void javaMin10() {
 	void other() {
 		evaluateCondition();
 		assertDisabledOnCurrentJreIf(!(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13()
-				|| onJava14() || onJava15() || onJava16() || onJava17()));
+				|| onJava14() || onJava15() || onJava16() || onJava17() || onJava18()));
 	}
 
 	private void assertDisabledOnCurrentJreIf(boolean condition) {
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeIntegrationTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeIntegrationTests.java
index da27aa6b4a25..93b8e7d55085 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeIntegrationTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledForJreRangeIntegrationTests.java
@@ -21,6 +21,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 import static org.junit.jupiter.api.condition.JRE.JAVA_10;
@@ -86,7 +87,7 @@ void javaMin10() {
 	@DisabledForJreRange(min = OTHER, max = OTHER)
 	void other() {
 		assertTrue(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13() || onJava14()
-				|| onJava15() || onJava16() || onJava17());
+				|| onJava15() || onJava16() || onJava17() || onJava18());
 	}
 
 }
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreConditionTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreConditionTests.java
index c0428d3e80b5..f0f65ab91378 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreConditionTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreConditionTests.java
@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 
@@ -166,6 +167,15 @@ void java17() {
 		assertDisabledOnCurrentJreIf(onJava17());
 	}
 
+	/**
+	 * @see DisabledOnJreIntegrationTests#java18()
+	 */
+	@Test
+	void java18() {
+		evaluateCondition();
+		assertDisabledOnCurrentJreIf(onJava18());
+	}
+
 	/**
 	 * @see DisabledOnJreIntegrationTests#other()
 	 */
@@ -173,7 +183,7 @@ void java17() {
 	void other() {
 		evaluateCondition();
 		assertDisabledOnCurrentJreIf(!(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13()
-				|| onJava14() || onJava15() || onJava16() || onJava17()));
+				|| onJava14() || onJava15() || onJava16() || onJava17() || onJava18()));
 	}
 
 	private void assertDisabledOnCurrentJreIf(boolean condition) {
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreIntegrationTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreIntegrationTests.java
index 3cabc869504e..8414b1bc98e0 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreIntegrationTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/DisabledOnJreIntegrationTests.java
@@ -21,6 +21,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 import static org.junit.jupiter.api.condition.JRE.JAVA_10;
@@ -31,6 +32,7 @@
 import static org.junit.jupiter.api.condition.JRE.JAVA_15;
 import static org.junit.jupiter.api.condition.JRE.JAVA_16;
 import static org.junit.jupiter.api.condition.JRE.JAVA_17;
+import static org.junit.jupiter.api.condition.JRE.JAVA_18;
 import static org.junit.jupiter.api.condition.JRE.JAVA_8;
 import static org.junit.jupiter.api.condition.JRE.JAVA_9;
 import static org.junit.jupiter.api.condition.JRE.OTHER;
@@ -58,7 +60,7 @@ void missingJreDeclaration() {
 
 	@Test
 	@DisabledOnJre(value = { JAVA_8, JAVA_9, JAVA_10, JAVA_11, JAVA_12, JAVA_13, JAVA_14, JAVA_15, JAVA_16, JAVA_17,
-			OTHER }, disabledReason = "Disabled on every JRE")
+			JAVA_18, OTHER }, disabledReason = "Disabled on every JRE")
 	void disabledOnAllJavaVersions() {
 		fail("should be disabled");
 	}
@@ -123,11 +125,17 @@ void java17() {
 		assertFalse(onJava17());
 	}
 
+	@Test
+	@DisabledOnJre(JAVA_18)
+	void java18() {
+		assertFalse(onJava18());
+	}
+
 	@Test
 	@DisabledOnJre(OTHER)
 	void other() {
 		assertTrue(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13() || onJava14()
-				|| onJava15() || onJava16() || onJava17());
+				|| onJava15() || onJava16() || onJava17() || onJava18());
 	}
 
 }
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeConditionTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeConditionTests.java
index 7f70a1b3937b..7d908f768c08 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeConditionTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeConditionTests.java
@@ -19,6 +19,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 
@@ -119,7 +120,7 @@ void javaMin10() {
 	void other() {
 		evaluateCondition();
 		assertEnabledOnCurrentJreIf(!(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13()
-				|| onJava14() || onJava15() || onJava16() || onJava17()));
+				|| onJava14() || onJava15() || onJava16() || onJava17() || onJava18()));
 	}
 
 	private void assertEnabledOnCurrentJreIf(boolean condition) {
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeIntegrationTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeIntegrationTests.java
index 241eadb79aeb..4416a28699cb 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeIntegrationTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeIntegrationTests.java
@@ -21,6 +21,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 import static org.junit.jupiter.api.condition.JRE.JAVA_10;
@@ -83,7 +84,7 @@ void javaMax12() {
 	@EnabledForJreRange(min = JAVA_10)
 	void javaMin10() {
 		assertTrue(onJava10() || onJava11() || onJava12() || onJava13() || onJava14() || onJava15() || onJava16()
-				|| onJava17());
+				|| onJava17() || onJava18());
 		assertFalse(onJava9());
 	}
 
@@ -91,7 +92,7 @@ void javaMin10() {
 	@EnabledForJreRange(min = OTHER, max = OTHER)
 	void other() {
 		assertFalse(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13() || onJava14()
-				|| onJava15() || onJava16() || onJava17());
+				|| onJava15() || onJava16() || onJava17() || onJava18());
 	}
 
 }
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreConditionTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreConditionTests.java
index abe24fa05d10..a782b07728a0 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreConditionTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreConditionTests.java
@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava15;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava16;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava17;
+import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava18;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava8;
 import static org.junit.jupiter.api.condition.EnabledOnJreIntegrationTests.onJava9;
 
@@ -165,6 +166,15 @@ void java17() {
 		assertEnabledOnCurrentJreIf(onJava17());
 	}
 
+	/**
+	 * @see EnabledOnJreIntegrationTests#java18()
+	 */
+	@Test
+	void java18() {
+		evaluateCondition();
+		assertEnabledOnCurrentJreIf(onJava18());
+	}
+
 	/**
 	 * @see EnabledOnJreIntegrationTests#other()
 	 */
@@ -172,7 +182,7 @@ void java17() {
 	void other() {
 		evaluateCondition();
 		assertEnabledOnCurrentJreIf(!(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13()
-				|| onJava14() || onJava15() || onJava16() || onJava17()));
+				|| onJava14() || onJava15() || onJava16() || onJava17() || onJava18()));
 		assertCustomDisabledReasonIs("Disabled on almost every JRE");
 	}
 
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreIntegrationTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreIntegrationTests.java
index f170cad98c91..f1a9bbd430c9 100644
--- a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreIntegrationTests.java
+++ b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/condition/EnabledOnJreIntegrationTests.java
@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.condition.JRE.JAVA_15;
 import static org.junit.jupiter.api.condition.JRE.JAVA_16;
 import static org.junit.jupiter.api.condition.JRE.JAVA_17;
+import static org.junit.jupiter.api.condition.JRE.JAVA_18;
 import static org.junit.jupiter.api.condition.JRE.JAVA_8;
 import static org.junit.jupiter.api.condition.JRE.JAVA_9;
 import static org.junit.jupiter.api.condition.JRE.OTHER;
@@ -48,7 +49,8 @@ void missingJreDeclaration() {
 	}
 
 	@Test
-	@EnabledOnJre({ JAVA_8, JAVA_9, JAVA_10, JAVA_11, JAVA_12, JAVA_13, JAVA_14, JAVA_15, JAVA_16, JAVA_17, OTHER })
+	@EnabledOnJre({ JAVA_8, JAVA_9, JAVA_10, JAVA_11, JAVA_12, JAVA_13, JAVA_14, JAVA_15, JAVA_16, JAVA_17, JAVA_18,
+			OTHER })
 	void enabledOnAllJavaVersions() {
 	}
 
@@ -112,11 +114,17 @@ void java17() {
 		assertTrue(onJava17());
 	}
 
+	@Test
+	@EnabledOnJre(JAVA_18)
+	void java18() {
+		assertTrue(onJava18());
+	}
+
 	@Test
 	@EnabledOnJre(value = OTHER, disabledReason = "Disabled on almost every JRE")
 	void other() {
 		assertFalse(onJava8() || onJava9() || onJava10() || onJava11() || onJava12() || onJava13() || onJava14()
-				|| onJava15() || onJava16() || onJava17());
+				|| onJava15() || onJava16() || onJava17() || onJava18());
 	}
 
 	static boolean onJava8() {
@@ -159,4 +167,8 @@ static boolean onJava17() {
 		return JAVA_VERSION.startsWith("17");
 	}
 
+	static boolean onJava18() {
+		return JAVA_VERSION.startsWith("18");
+	}
+
 }