diff --git a/lib/installer.js b/lib/installer.js
index 3bd818d..6c7caec 100644
--- a/lib/installer.js
+++ b/lib/installer.js
@@ -53,15 +53,15 @@ function getJuliaReleases() {
         });
     });
 }
-function getJuliaVersion(versionInput) {
+exports.getJuliaReleases = getJuliaReleases;
+function getJuliaVersion(availableReleases, versionInput) {
     return __awaiter(this, void 0, void 0, function* () {
         if (semver.valid(versionInput) == versionInput) {
             // versionInput is a valid version, use it directly
             return versionInput;
         }
         // Use the highest available version that matches versionInput
-        const releases = yield getJuliaReleases();
-        let version = semver.maxSatisfying(releases, versionInput);
+        let version = semver.maxSatisfying(availableReleases, versionInput);
         if (version == null) {
             throw `Could not find a Julia version that matches ${versionInput}`;
         }
diff --git a/lib/setup-julia.js b/lib/setup-julia.js
index 6b7b976..ed8f598 100644
--- a/lib/setup-julia.js
+++ b/lib/setup-julia.js
@@ -25,7 +25,8 @@ function run() {
         try {
             const versionInput = core.getInput('version');
             const arch = core.getInput('arch');
-            const version = yield installer.getJuliaVersion(versionInput);
+            const availableReleases = yield installer.getJuliaReleases();
+            const version = yield installer.getJuliaVersion(availableReleases, versionInput);
             core.debug(`selected Julia version: ${arch}/${version}`);
             // Search in cache
             let juliaPath;
diff --git a/src/installer.ts b/src/installer.ts
index fed052d..427f021 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -12,7 +12,7 @@ import * as semver from 'semver'
 const osPlat = os.platform() // possible values: win32 (Windows), linux (Linux), darwin (macOS)
 core.debug(`platform: ${osPlat}`)
 
-async function getJuliaReleases(): Promise<string[]> {
+export async function getJuliaReleases(): Promise<string[]> {
     // Wrap everything in a Promise so that it can be called with await.
     return new Promise((resolve, reject) => {
         const options = {
@@ -42,15 +42,14 @@ async function getJuliaReleases(): Promise<string[]> {
     })
 }
 
-export async function getJuliaVersion(versionInput: string): Promise<string> {
+export async function getJuliaVersion(availableReleases: string[], versionInput: string): Promise<string> {
     if (semver.valid(versionInput) == versionInput) {
         // versionInput is a valid version, use it directly
         return versionInput
     }
 
     // Use the highest available version that matches versionInput
-    const releases = await getJuliaReleases()
-    let version = semver.maxSatisfying(releases, versionInput)
+    let version = semver.maxSatisfying(availableReleases, versionInput)
     if (version == null) {
         throw `Could not find a Julia version that matches ${versionInput}`
     }
diff --git a/src/setup-julia.ts b/src/setup-julia.ts
index 1225c80..5dd4a2e 100644
--- a/src/setup-julia.ts
+++ b/src/setup-julia.ts
@@ -10,7 +10,8 @@ async function run() {
     try {
         const versionInput = core.getInput('version')
         const arch = core.getInput('arch')
-        const version = await installer.getJuliaVersion(versionInput)
+        const availableReleases = await installer.getJuliaReleases()
+        const version = await installer.getJuliaVersion(availableReleases, versionInput)
         core.debug(`selected Julia version: ${arch}/${version}`)
 
         // Search in cache