diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/forge/SingleJarTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/forge/SingleJarTest.groovy
new file mode 100644
index 00000000..102c1842
--- /dev/null
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/forge/SingleJarTest.groovy
@@ -0,0 +1,65 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2023 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.test.integration.forge
+
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import net.fabricmc.loom.test.util.CartesianProduct
+import net.fabricmc.loom.test.util.GradleProjectTestTrait
+
+import static net.fabricmc.loom.test.LoomTestConstants.STANDARD_TEST_VERSIONS
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+class SingleJarTest extends Specification implements GradleProjectTestTrait {
+	@Unroll
+	def "build single jar mc (mc #mc, forge #forge, env #env, gradle #version)"() {
+		setup:
+		def gradle = gradleProject(project: 'forge/singleJar', version: version)
+		gradle.buildGradle.text = gradle.buildGradle.text
+				.replace('@MCVERSION@', mc)
+				.replace('@FORGEVERSION@', forge)
+				.replace('@ENV@', env)
+
+		when:
+		def result = gradle.run(task: 'build')
+
+		then:
+		result.task(':build').outcome == SUCCESS
+
+		where:
+		[mc, forge, env, version] << CartesianProduct.addValuesToEach(
+		[
+			['1.19.4', "45.0.43"],
+			['1.18.1', "39.0.63"],
+			['1.17.1', "37.0.67"],
+			['1.16.5', "36.2.4"],
+			['1.14.4', "28.2.23"]
+		],
+		['client', 'server'],
+		STANDARD_TEST_VERSIONS
+		)
+	}
+}
diff --git a/src/test/groovy/net/fabricmc/loom/test/util/CartesianProduct.groovy b/src/test/groovy/net/fabricmc/loom/test/util/CartesianProduct.groovy
new file mode 100644
index 00000000..c1edb1c9
--- /dev/null
+++ b/src/test/groovy/net/fabricmc/loom/test/util/CartesianProduct.groovy
@@ -0,0 +1,51 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2023 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.test.util
+
+class CartesianProduct {
+	static <T> List<List<T>> addValuesToEach(List<? extends List<? extends T>> input, List<? extends T> values) {
+		List<List<T>> result = []
+
+		for (List<? extends T> row in input) {
+			for (T value in values) {
+				List<T> newRow = new ArrayList<>(row)
+				newRow.add(value)
+				result.add(newRow)
+			}
+		}
+
+		return result
+	}
+
+	static <T> List<List<T>> addValuesToEach(List<? extends List<? extends T>> input, List<? extends T>... values) {
+		List<List<T>> result = input as List<List<T>>
+
+		for (List<? extends T> valueList in values) {
+			result = addValuesToEach(result, valueList)
+		}
+
+		return result
+	}
+}
diff --git a/src/test/resources/projects/forge/singleJar/build.gradle b/src/test/resources/projects/forge/singleJar/build.gradle
new file mode 100644
index 00000000..99d3cd63
--- /dev/null
+++ b/src/test/resources/projects/forge/singleJar/build.gradle
@@ -0,0 +1,88 @@
+plugins {
+	id 'dev.architectury.loom'
+	id 'maven-publish'
+}
+
+java {
+	sourceCompatibility = JavaVersion.VERSION_1_8
+	targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+base {
+	archivesName = project.archives_base_name
+}
+
+version = project.mod_version
+group = project.maven_group
+
+loom {
+	if ('@ENV@' == 'client') {
+		clientOnlyMinecraftJar()
+	} else {
+		serverOnlyMinecraftJar()
+	}
+}
+
+def mcVersion = "@MCVERSION@"
+def forgeVersion = "@FORGEVERSION@"
+
+repositories {
+	// Add repositories to retrieve artifacts from in here.
+	// You should only use this when depending on other mods because
+	// Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
+	// See https://docs.gradle.org/current/userguide/declaring_repositories.html
+	// for more information about repositories.
+}
+
+dependencies {
+	// To change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:$mcVersion"
+	mappings loom.officialMojangMappings()
+	forge "net.minecraftforge:forge:$mcVersion-$forgeVersion"
+}
+
+tasks.withType(JavaCompile).configureEach {
+	// ensure that the encoding is set to UTF-8, no matter what the system default is
+	// this fixes some edge cases with special characters not displaying correctly
+	// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+	// If Javadoc is generated, this must be specified in that task too.
+	it.options.encoding = "UTF-8"
+
+	// The Minecraft launcher currently installs Java 8 for users, so your mod probably wants to target Java 8 too
+	// JDK 9 introduced a new way of specifying this that will make sure no newer classes or methods are used.
+	// We'll use that if it's available, but otherwise we'll use the older option.
+	def targetVersion = 8
+	if (JavaVersion.current().isJava9Compatible()) {
+		it.options.release = targetVersion
+	}
+}
+
+java {
+	// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+	// if it is present.
+	// If you remove this line, sources will not be generated.
+	withSourcesJar()
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(remapJar) {
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// See https://docs.gradle.org/current/userguide/publishing_maven.html for information on how to set up publishing.
+	repositories {
+		// Add repositories to publish to here.
+		// Notice: This block does NOT have the same function as the block in the top level.
+		// The repositories here will be used for publishing your artifact, not for
+		// retrieving dependencies.
+	}
+}
diff --git a/src/test/resources/projects/forge/singleJar/gradle.properties b/src/test/resources/projects/forge/singleJar/gradle.properties
new file mode 100644
index 00000000..26236f58
--- /dev/null
+++ b/src/test/resources/projects/forge/singleJar/gradle.properties
@@ -0,0 +1,8 @@
+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+
+# Mod Properties
+mod_version = 1.0.0
+maven_group = com.example
+archives_base_name = fabric-example-mod
+loom.platform=forge
diff --git a/src/test/resources/projects/forge/singleJar/settings.gradle b/src/test/resources/projects/forge/singleJar/settings.gradle
new file mode 100644
index 00000000..c162c363
--- /dev/null
+++ b/src/test/resources/projects/forge/singleJar/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = "fabric-example-mod"
+