diff --git a/build.gradle b/build.gradle
index 7510784bd..a7e03c0f3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -335,6 +335,7 @@ configure(subprojects - sampleProjects - toolProjects) {
 }
 
 
+apply from: 'gradle/scripts/check-dexer.gradle'
 apply from: 'gradle/scripts/gh-pages.gradle'
 apply from: 'gradle/scripts/jacoco-multi-project.gradle'
 
@@ -528,90 +529,6 @@ configure(subprojects - getJsProjects()) { subproject ->
     }
 }
 
-def preCheck_ATRIUM_ANDROID_JAR = task('preCheck_ATRIUM_ANDROID_JAR') {
-    doFirst {
-        if (System.getenv('ATRIUM_ANDROID_JAR') == null) {
-            throw new InvalidUserDataException("env variable ATRIUM_ANDROID_JAR not set. Point it to the android SDK android.jar path (e.g. /android-sdk-linux/platforms/android-26/android.jar")
-        }
-        println("Using android.jar defined at: ${System.getenv('ATRIUM_ANDROID_JAR')}")
-    }
-}
-
-def dexerProjects = jvmProjects.findAll {
-    !it.name.contains("-specs-")
-}
-configure(dexerProjects) { subproject ->
-    configurations {
-        r8
-        d8
-    }
-    repositories {
-        google()
-    }
-    dependencies {
-        r8 "com.android.tools:r8:$d8_version"
-        d8 subproject
-    }
-
-    afterEvaluate {
-        task('checkDexer', type: JavaExec, description: 'compiles android class files into dex bytecode') {
-            inputs.property 'ATRIUM_ANDROID_JAR', System.getenv('ATRIUM_ANDROID_JAR')
-
-            def outputPath = "${subproject.buildDir}/d8"
-            outputs.dir(outputPath)
-            dependsOn jar
-            dependsOn preCheck_ATRIUM_ANDROID_JAR
-            jar.mustRunAfter(preCheck_ATRIUM_ANDROID_JAR)
-
-            classpath subproject.configurations.r8.asPath
-            main = "com.android.tools.r8.D8"
-
-            def d8Classpath = subproject.configurations.d8.files.collect {
-                ["--classpath", it.getAbsolutePath()]
-            }.flatten()
-
-            def androidJarPath = System.getenv('ATRIUM_ANDROID_JAR')
-
-            // ATRIUM_ANDROID_JAR has to point to something like /android-sdk-linux/platforms/android-XY/android.jar
-            // where Xy is the version we want to support
-            def androidJar = androidJarPath != null ? ['--lib', androidJarPath] : []
-
-            args = d8Classpath + androidJar + ['--output', outputPath, jar.archiveFile.get().asFile]
-
-            def oldStream = errorOutput
-            def outputWritten = false
-            errorOutput = new OutputStream() {
-                @Override
-                void write(int b) {
-                    outputWritten = true
-                    oldStream.write(b)
-                }
-            }
-            doLast {
-                if (outputWritten) {
-                    throw new GradleException("checkDexer failed due to output, see above.")
-                }
-            }
-        }
-    }
-}
-def preCheckDexerProjects = task('preCheckDexerProjects', dependsOn: preCheck_ATRIUM_ANDROID_JAR) {
-    doFirst {
-        if (dexerProjects.size() == 0) {
-            throw new InvalidUserDataException("env variable CI not set and hence no android projects included. Use e.g. `CI=true gradlew checkDexer`")
-        }
-    }
-}
-task('checkDexer', description: 'executes all checkDexer tasks', dependsOn: 'preCheckDexerProjects') {
-
-    dexerProjects.forEach { subproject ->
-        subproject.afterEvaluate {
-            Task subprojectCheckDexer = subproject.tasks.getByName("checkDexer")
-            dependsOn subprojectCheckDexer
-            subprojectCheckDexer.mustRunAfter(preCheckDexerProjects)
-        }
-    }
-}
 
 /*
 Release & deploy a commit
diff --git a/gradle/scripts/check-dexer.gradle b/gradle/scripts/check-dexer.gradle
new file mode 100644
index 000000000..3866e465f
--- /dev/null
+++ b/gradle/scripts/check-dexer.gradle
@@ -0,0 +1,85 @@
+
+def preCheck_ATRIUM_ANDROID_JAR = task('preCheck_ATRIUM_ANDROID_JAR') {
+    doFirst {
+        if (System.getenv('ATRIUM_ANDROID_JAR') == null) {
+            throw new InvalidUserDataException("env variable ATRIUM_ANDROID_JAR not set. Point it to the android SDK android.jar path (e.g. /android-sdk-linux/platforms/android-26/android.jar")
+        }
+        println("Using android.jar defined at: ${System.getenv('ATRIUM_ANDROID_JAR')}")
+    }
+}
+
+def dexerProjects = getJvmProjects().findAll {
+    !it.name.contains("-specs-")
+}
+configure(dexerProjects) { subproject ->
+    configurations {
+        r8
+        d8
+    }
+    repositories {
+        google()
+    }
+    dependencies {
+        r8 "com.android.tools:r8:$d8_version"
+        d8 subproject
+    }
+
+    afterEvaluate {
+        task('checkDexer', type: JavaExec, description: 'compiles android class files into dex bytecode') {
+            inputs.property 'ATRIUM_ANDROID_JAR', System.getenv('ATRIUM_ANDROID_JAR')
+
+            def outputPath = "${subproject.buildDir}/d8"
+            outputs.dir(outputPath)
+            dependsOn jar
+            dependsOn preCheck_ATRIUM_ANDROID_JAR
+            jar.mustRunAfter(preCheck_ATRIUM_ANDROID_JAR)
+
+            classpath subproject.configurations.r8.asPath
+            main = "com.android.tools.r8.D8"
+
+            def d8Classpath = subproject.configurations.d8.files.collect {
+                ["--classpath", it.getAbsolutePath()]
+            }.flatten()
+
+            def androidJarPath = System.getenv('ATRIUM_ANDROID_JAR')
+
+            // ATRIUM_ANDROID_JAR has to point to something like /android-sdk-linux/platforms/android-XY/android.jar
+            // where Xy is the version we want to support
+            def androidJar = androidJarPath != null ? ['--lib', androidJarPath] : []
+
+            args = d8Classpath + androidJar + ['--output', outputPath, jar.archiveFile.get().asFile]
+
+            def oldStream = errorOutput
+            def outputWritten = false
+            errorOutput = new OutputStream() {
+                @Override
+                void write(int b) {
+                    outputWritten = true
+                    oldStream.write(b)
+                }
+            }
+            doLast {
+                if (outputWritten) {
+                    throw new GradleException("checkDexer failed due to output, see above.")
+                }
+            }
+        }
+    }
+}
+def preCheckDexerProjects = task('preCheckDexerProjects', dependsOn: preCheck_ATRIUM_ANDROID_JAR) {
+    doFirst {
+        if (dexerProjects.size() == 0) {
+            throw new InvalidUserDataException("env variable CI not set and hence no android projects included. Use e.g. `CI=true gradlew checkDexer`")
+        }
+    }
+}
+task('checkDexer', description: 'executes all checkDexer tasks', dependsOn: 'preCheckDexerProjects') {
+
+    dexerProjects.forEach { subproject ->
+        subproject.afterEvaluate {
+            Task subprojectCheckDexer = subproject.tasks.getByName("checkDexer")
+            dependsOn subprojectCheckDexer
+            subprojectCheckDexer.mustRunAfter(preCheckDexerProjects)
+        }
+    }
+}