diff --git a/build.gradle.kts b/build.gradle.kts
index 61da86a5..6bca9ae6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -115,6 +115,10 @@ allprojects {
         exclude(group = "com.github.cryptomorin", module = "XSeries")
     }
 
+    configurations.testImplementation {
+        setExtendsFrom(listOf(configurations.compileOnly.get()))
+    }
+
     tasks {
         compileKotlin {
             kotlinOptions {
diff --git a/eco-core/core-plugin/src/test/java/StringUtilsTest.java b/eco-api/src/test/java/StringUtilsTest.java
similarity index 100%
rename from eco-core/core-plugin/src/test/java/StringUtilsTest.java
rename to eco-api/src/test/java/StringUtilsTest.java
diff --git a/eco-core/build.gradle b/eco-core/build.gradle
index f9caa60f..482988be 100644
--- a/eco-core/build.gradle
+++ b/eco-core/build.gradle
@@ -4,6 +4,5 @@ version rootProject.version
 subprojects {
     dependencies {
         compileOnly project(":eco-api")
-        testCompileOnly project(":eco-api")
     }
 }