diff --git a/build.gradle b/build.gradle
index a7aaba1..d35a667 100644
--- a/build.gradle
+++ b/build.gradle
@@ -32,5 +32,7 @@ ext {
     googleAutoServiceVersion = '1.0-rc6'
     squareupJavaPoetVersion = '1.11.1'
 
+    junitVersion = '4.12'
+
     wellSqlAnnotationsProjectDependency = project.hasProperty("wellSqlAnnotationsVersion") ? "org.wordpress.wellsql:wellsql-annotations:${project.getProperty("wellSqlAnnotationsVersion")}" : project(":well-annotations")
 }
diff --git a/well-sample/build.gradle b/well-sample/build.gradle
index 19d45f1..c677bdf 100644
--- a/well-sample/build.gradle
+++ b/well-sample/build.gradle
@@ -32,6 +32,6 @@ dependencies {
     annotationProcessor project(':well-processor')
     implementation "androidx.appcompat:appcompat:1.3.1"
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$junitVersion"
     androidTestImplementation "androidx.test:runner:1.5.2"
 }
diff --git a/wellsql/build.gradle b/wellsql/build.gradle
index 76313df..1ae3b25 100644
--- a/wellsql/build.gradle
+++ b/wellsql/build.gradle
@@ -24,7 +24,7 @@ android {
 dependencies {
     api wellSqlAnnotationsProjectDependency
     implementation "androidx.annotation:annotation:$androidxAnnotationVersion"
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$junitVersion"
 }
 
 project.afterEvaluate {