diff --git a/build.gradle b/build.gradle
index d0799c72..02bbe74c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,7 +37,9 @@ plugins {
 //}
 
 project.ext {
-    openrndrVersion = "0.3.35-rc1"
+    openrndrVersion = "0.3.35"
+    kotlinVersion = "1.3.41"
+    spekVersion = "2.0.6"
 }
 
 allprojects {
@@ -66,13 +68,25 @@ allprojects {
         maven {
             url = "https://dl.bintray.com/openrndr/openrndr"
         }
+
+
+        maven {
+            url "https://dl.bintray.com/spekframework/spek"
+        }
+
+
     }
 
     dependencies {
         compile "org.openrndr:openrndr-core:$openrndrVersion"
         compile "org.openrndr:openrndr-filter:$openrndrVersion"
         compile "org.openrndr:openrndr-shape:$openrndrVersion"
-        compile group: 'org.jetbrains.kotlinx', name: 'kotlinx-coroutines-core', version: '1.3.0-RC'
+        compile group: 'org.jetbrains.kotlinx', name: 'kotlinx-coroutines-core', version: '1.3.0-RC2'
+
+        testImplementation "org.spekframework.spek2:spek-dsl-jvm:$spekVersion"
+        testImplementation "org.jetbrains.kotlin:kotlin-test:$kotlinVersion"
+        testRuntimeOnly "org.spekframework.spek2:spek-runner-junit5:$spekVersion"
+        testRuntimeOnly "org.jetbrains.kotlin:kotlin-reflect:$kotlinVersion"
     }
 
     contacts {
@@ -96,4 +110,9 @@ allprojects {
         }
     }
 
+    test {
+        useJUnitPlatform {
+            includeEngines 'spek2'
+        }
+    }
 }
\ No newline at end of file
diff --git a/orx-noise/src/test/kotlin/TestMathUtils.kt b/orx-noise/src/test/kotlin/TestMathUtils.kt
new file mode 100644
index 00000000..d98c8761
--- /dev/null
+++ b/orx-noise/src/test/kotlin/TestMathUtils.kt
@@ -0,0 +1,12 @@
+import org.openrndr.extra.noise.fastFloor
+import org.spekframework.spek2.Spek
+import org.spekframework.spek2.style.specification.describe
+import kotlin.test.assertEquals
+
+object TestMathUtils : Spek({
+    describe("Fast floor") {
+        it("it is corrrect for 0.0") {
+            assertEquals(0, 0.0.fastFloor())
+        }
+    }
+})
\ No newline at end of file