diff --git a/build.gradle.kts b/build.gradle.kts
index bf84d0158..aa4265751 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -43,9 +43,6 @@ spotless {
   }
 }
 
-val testKit: SourceSet by sourceSets.creating
-val testKitImplementation: Configuration by configurations.getting
-
 val intiTest: SourceSet by sourceSets.creating
 val intiTestImplementation: Configuration by configurations.getting {
   extendsFrom(configurations.testImplementation.get())
@@ -77,11 +74,6 @@ dependencies {
   implementation(libs.plexus.utils)
   implementation(libs.plexus.xml)
 
-  val mainOutput = sourceSets.main.map { it.output }
-  testKitImplementation(mainOutput)
-  testKitImplementation(gradleTestKit())
-
-  testImplementation(testKit.output)
   testImplementation(platform(libs.junit.bom))
   testImplementation(libs.junit.jupiter)
   testImplementation(libs.assertk)
@@ -93,7 +85,7 @@ dependencies {
     exclude(group = "org.codehaus.groovy")
     exclude(group = "org.hamcrest")
   }
-  funcTestImplementation(mainOutput)
+  funcTestImplementation(sourceSets.main.get().output)
 
   lintChecks(libs.androidx.gradlePluginLints)
   lintChecks(libs.assertk.lint)
diff --git a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerSpec.groovy b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerSpec.groovy
index 6fc067a6b..72a5e40c3 100644
--- a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerSpec.groovy
+++ b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerSpec.groovy
@@ -22,7 +22,6 @@ package com.github.jengelman.gradle.plugins.shadow.transformers
 import com.github.jengelman.gradle.plugins.shadow.transformers.PropertiesFileTransformer.MergeStrategy
 import spock.lang.Unroll
 
-import static com.github.jengelman.gradle.plugins.shadow.testkit.util.Utils.testObjectFactory
 import static groovy.lang.Closure.IDENTITY
 
 @Unroll
@@ -30,7 +29,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
 
     void "Path #path #transform transformed"() {
         given:
-        Transformer transformer = new PropertiesFileTransformer(testObjectFactory)
+        Transformer transformer = new PropertiesFileTransformer(objectFactory)
 
         when:
         boolean actual = transformer.canTransformResource(getFileElement(path))
@@ -50,7 +49,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
     void exerciseAllTransformConfigurations() {
         given:
         def element = getFileElement(path)
-        Transformer transformer = new PropertiesFileTransformer(testObjectFactory)
+        Transformer transformer = new PropertiesFileTransformer(objectFactory)
         transformer.mergeStrategy.set(MergeStrategy.from(mergeStrategy))
         transformer.mergeSeparator.set(mergeSeparator)
 
@@ -74,7 +73,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
     void exerciseAllTransformConfigurationsWithPaths() {
         given:
         def element = getFileElement(path)
-        Transformer transformer = new PropertiesFileTransformer(testObjectFactory)
+        Transformer transformer = new PropertiesFileTransformer(objectFactory)
         transformer.paths.set(paths)
         transformer.mergeStrategy.set(MergeStrategy.from('first'))
 
@@ -98,7 +97,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
     void exerciseAllTransformConfigurationsWithMappings() {
         given:
         def element = getFileElement(path)
-        Transformer transformer = new PropertiesFileTransformer(testObjectFactory)
+        Transformer transformer = new PropertiesFileTransformer(objectFactory)
         transformer.mappings.set(mappings)
         transformer.mergeStrategy.set(MergeStrategy.from('latest'))
 
@@ -124,7 +123,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
     void appliesKeyTransformer() {
         given:
         def element = getFileElement(path)
-        Transformer transformer = new PropertiesFileTransformer(testObjectFactory)
+        Transformer transformer = new PropertiesFileTransformer(objectFactory)
         transformer.keyTransformer.set(keyTransformer)
         transformer.mergeStrategy.set(MergeStrategy.from('append'))
 
@@ -148,7 +147,7 @@ class PropertiesFileTransformerSpec extends TransformerSpecSupport {
     void appliesCharset() {
         given:
         def element = getFileElement(path)
-        def transformer = new PropertiesFileTransformer(testObjectFactory)
+        def transformer = new PropertiesFileTransformer(objectFactory)
         transformer.charsetName.set(charset)
 
         when:
diff --git a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/TransformerSpecSupport.groovy b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/TransformerSpecSupport.groovy
index 86978937c..818697e0b 100644
--- a/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/TransformerSpecSupport.groovy
+++ b/src/funcTest/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/TransformerSpecSupport.groovy
@@ -4,11 +4,14 @@ import com.github.jengelman.gradle.plugins.shadow.ShadowStats
 import org.gradle.api.file.FileTreeElement
 import org.gradle.api.file.RelativePath
 import org.gradle.api.internal.file.DefaultFileTreeElement
+import org.gradle.testfixtures.ProjectBuilder
 import spock.lang.Shared
 import spock.lang.Specification
 
 class TransformerSpecSupport extends Specification {
 
+    protected static final def objectFactory = ProjectBuilder.builder().build().objects
+
     @Shared
     ShadowStats stats
 
diff --git a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheNoticeResourceTransformerTest.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheNoticeResourceTransformerTest.kt
index f8cf651ff..05d013dbf 100644
--- a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheNoticeResourceTransformerTest.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheNoticeResourceTransformerTest.kt
@@ -4,7 +4,7 @@ import assertk.assertThat
 import assertk.assertions.isFalse
 import assertk.assertions.isTrue
 import assertk.fail
-import com.github.jengelman.gradle.plugins.shadow.testkit.util.testObjectFactory
+import com.github.jengelman.gradle.plugins.shadow.util.testObjectFactory
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
diff --git a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/AppendingTransformerTest.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/AppendingTransformerTest.kt
index 681000705..b5eee7d89 100644
--- a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/AppendingTransformerTest.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/AppendingTransformerTest.kt
@@ -3,7 +3,7 @@ package com.github.jengelman.gradle.plugins.shadow.transformers
 import assertk.assertThat
 import assertk.assertions.isFalse
 import assertk.assertions.isTrue
-import com.github.jengelman.gradle.plugins.shadow.testkit.util.testObjectFactory
+import com.github.jengelman.gradle.plugins.shadow.util.testObjectFactory
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
diff --git a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ManifestAppenderTransformerTest.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ManifestAppenderTransformerTest.kt
index 935c98da6..9c1e8c084 100644
--- a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ManifestAppenderTransformerTest.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/ManifestAppenderTransformerTest.kt
@@ -6,7 +6,7 @@ import assertk.assertions.isFalse
 import assertk.assertions.isGreaterThan
 import assertk.assertions.isNotEmpty
 import assertk.assertions.isTrue
-import com.github.jengelman.gradle.plugins.shadow.testkit.util.testObjectFactory
+import com.github.jengelman.gradle.plugins.shadow.util.testObjectFactory
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
diff --git a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerTest.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerTest.kt
index 81e084d43..3106cc9ba 100644
--- a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerTest.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/PropertiesFileTransformerTest.kt
@@ -6,7 +6,7 @@ import assertk.assertions.isEqualTo
 import assertk.assertions.isFalse
 import assertk.assertions.isNotEmpty
 import assertk.assertions.isTrue
-import com.github.jengelman.gradle.plugins.shadow.testkit.util.testObjectFactory
+import com.github.jengelman.gradle.plugins.shadow.util.testObjectFactory
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
diff --git a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/XmlAppendingTransformerTest.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/XmlAppendingTransformerTest.kt
index 32895d9fc..1eaf76436 100644
--- a/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/XmlAppendingTransformerTest.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/XmlAppendingTransformerTest.kt
@@ -3,7 +3,7 @@ package com.github.jengelman.gradle.plugins.shadow.transformers
 import assertk.assertThat
 import assertk.assertions.isFalse
 import assertk.assertions.isTrue
-import com.github.jengelman.gradle.plugins.shadow.testkit.util.testObjectFactory
+import com.github.jengelman.gradle.plugins.shadow.util.testObjectFactory
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
diff --git a/src/testKit/kotlin/com/github/jengelman/gradle/plugins/shadow/testkit/util/Utils.kt b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/util/Utils.kt
similarity index 65%
rename from src/testKit/kotlin/com/github/jengelman/gradle/plugins/shadow/testkit/util/Utils.kt
rename to src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/util/Utils.kt
index 0785681b0..a6acfd481 100644
--- a/src/testKit/kotlin/com/github/jengelman/gradle/plugins/shadow/testkit/util/Utils.kt
+++ b/src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/util/Utils.kt
@@ -1,6 +1,4 @@
-@file:JvmName("Utils")
-
-package com.github.jengelman.gradle.plugins.shadow.testkit.util
+package com.github.jengelman.gradle.plugins.shadow.util
 
 import org.gradle.api.model.ObjectFactory
 import org.gradle.testfixtures.ProjectBuilder