diff --git a/index.js b/index.js
index 3630144..8fb9db6 100644
--- a/index.js
+++ b/index.js
@@ -128,17 +128,27 @@ let hasNativeReservationSupportCache = null
  * @returns {boolean} True if native reservation supported
  */
 function isNativeReservationSupported() {
-  if (process.env.DATAFORM_MOCK_NATIVE_RESERVATION === 'true') return true
-  if (process.env.DATAFORM_MOCK_NATIVE_RESERVATION === 'false') return false
-
   if (hasNativeReservationSupportCache !== null) {
     return hasNativeReservationSupportCache
   }
 
+  if (process.env.DATAFORM_MOCK_NATIVE_RESERVATION === 'true') {
+    hasNativeReservationSupportCache = true
+    return true
+  }
+  if (process.env.DATAFORM_MOCK_NATIVE_RESERVATION === 'false') {
+    hasNativeReservationSupportCache = false
+    return false
+  }
+
   hasNativeReservationSupportCache = false
   return false
 }
 
+function resetNativeReservationSupportCache() {
+  hasNativeReservationSupportCache = null
+}
+
 /**
  * Helper to check if a query/array of queries has an outer DECLARE statement
  * @param {string|string[]|Function} sql - The SQL statement(s) to check
@@ -376,5 +386,6 @@ module.exports = {
   prependStatement,
   isArrayOrString,
   findReservation,
-  isNativeReservationSupported
+  isNativeReservationSupported,
+  resetNativeReservationSupportCache
 }
diff --git a/test/index.test.js b/test/index.test.js
index 1610b1b..f6770b4 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -2,7 +2,8 @@ const {
   createReservationSetter,
   getActionName,
   autoAssignActions,
-  isNativeReservationSupported
+  isNativeReservationSupported,
+  resetNativeReservationSupportCache
 } = require('../index')
 
 /**
@@ -63,6 +64,10 @@ describe('Dataform package', () => {
       process.env.DATAFORM_MOCK_NATIVE_RESERVATION = 'false'
     })
 
+    beforeEach(() => {
+      resetNativeReservationSupportCache()
+    })
+
     afterAll(() => {
       process.env.DATAFORM_MOCK_NATIVE_RESERVATION = originalEnv
     })
@@ -223,6 +228,7 @@ describe('Dataform package', () => {
     beforeEach(() => {
       originalEnv = process.env.DATAFORM_MOCK_NATIVE_RESERVATION
       originalDataform = global.dataform
+      resetNativeReservationSupportCache()
     })
 
     afterEach(() => {
@@ -269,6 +275,10 @@ describe('Dataform package', () => {
       process.env.DATAFORM_MOCK_NATIVE_RESERVATION = 'false'
     })
 
+    beforeEach(() => {
+      resetNativeReservationSupportCache()
+    })
+
     afterAll(() => {
       process.env.DATAFORM_MOCK_NATIVE_RESERVATION = originalEnv
     })
@@ -427,6 +437,7 @@ describe('Dataform package', () => {
       describe(`with native support = ${isNative}`, () => {
         beforeEach(() => {
           process.env.DATAFORM_MOCK_NATIVE_RESERVATION = String(isNative)
+          resetNativeReservationSupportCache()
         })
 
         test('should apply reservations to existing publish actions', () => {