diff --git a/modules/testing/src/main/kotlin/no/vegvesen/saga/modules/testing/KotestAssertionExtensions.kt b/modules/testing/src/main/kotlin/no/vegvesen/saga/modules/testing/KotestAssertionExtensions.kt
index 1259b6f3..90c10266 100644
--- a/modules/testing/src/main/kotlin/no/vegvesen/saga/modules/testing/KotestAssertionExtensions.kt
+++ b/modules/testing/src/main/kotlin/no/vegvesen/saga/modules/testing/KotestAssertionExtensions.kt
@@ -1,6 +1,7 @@
 package no.vegvesen.saga.modules.testing
 
 import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.doubles.shouldBeBetween
 import io.kotest.matchers.nulls.shouldNotBeNull
 
 fun <T> Collection<T>?.shouldContainSingle(match: (t: T) -> Boolean): T {
@@ -10,3 +11,7 @@ fun <T> Collection<T>?.shouldContainSingle(match: (t: T) -> Boolean): T {
         it.single()
     }
 }
+
+fun Double.shouldBeCloseTo(value: Double, tolerance: Double) {
+    this.shouldBeBetween(value, value, tolerance)
+}