diff --git a/.github/workflows/example_app.yml b/.github/workflows/example_app.yml
index 52f7afa..439b279 100644
--- a/.github/workflows/example_app.yml
+++ b/.github/workflows/example_app.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    name: Tests & Checks
+    name: Tests & Checks (Elixir ${{ matrix.elixir }} / OTP ${{ matrix.otp }})
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -19,14 +19,24 @@ jobs:
     env:
       MIX_ENV: test
 
+    strategy:
+      matrix:
+        include:
+          - elixir: '1.15.x'
+            otp: '25.x'
+          - elixir: '1.16.x'
+            otp: '26.x'
+          - elixir: '1.17.x'
+            otp: '27.x'
+
     steps:
       - uses: actions/checkout@v4
 
       - name: Setup Erlang and Elixir
-        uses: erlef/setup-beam@v1.17
+        uses: erlef/setup-beam@v1.18
         with:
-          elixir-version: "1.16.0-otp-26"
-          otp-version: "26.0"
+          elixir-version: ${{ matrix.elixir }}
+          otp-version: ${{ matrix.otp }}
 
       - name: Mix and build cache
         uses: actions/cache@v4
@@ -34,8 +44,9 @@ jobs:
           path: |
             ./tests/example_app/deps
             ./tests/example_app/_build
-          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
-          restore-keys: ${{ runner.os }}-mix-
+          key: ${{ runner.os }}-mix-${{ matrix.elixir }}-${{ matrix.otp }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ matrix.elixir }}-${{ matrix.otp }}-
 
       - name: Get dependencies
         run: mix deps.get
diff --git a/lib/parser.js b/lib/parser.js
index 9e5bda9..3b9e2ec 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -3,7 +3,8 @@ const calculatedData = (data, coverageThreshold) => ({
   testsSuccess: data.totalFailures === 0,
 });
 
-const parser = {
+// Used for Elixir <= 1.16
+const oldFormatParser = {
   pattern: /(.+?)(?=Finished)(.+sync\))\n(.*?)([0-9]+ failure[s]?)(.+)(Randomized with seed [0-9]+)(.+)(Percentage \| Module.+)( [0-9]+\.[0-9]+%)( \| Total)/gs,
   mapGroupsToData: (groups) => ({
     summary: groups[2],
@@ -15,7 +16,25 @@ const parser = {
   }),
 };
 
+// Used for Elixir >= 1.17
+const newFormatParser = {
+  pattern: /(Running ExUnit with seed: [0-9]+, max_cases: [0-9]+\n\n)(.+?)(?=Finished)(Finished.+sync\))\n(.*?)([0-9]+ failure[s]?)(.+?)(Percentage \| Module.+)((?:\n.+)+\n-+\|-+\n\s+([0-9]+\.[0-9]+)%\s+\|\s+Total)/s,
+  mapGroupsToData: (groups) => ({
+    summary: groups[3],
+    tests: groups[4].slice(0, -2),
+    totalFailures: parseInt(groups[5]),
+    totalCoverage: parseFloat(groups[9]),
+    randomizedSeed: groups[1].trim(),
+    coverageTable: groups[7] + groups[8],
+  }),
+};
+
+const detectFormat = (output) => output.includes("Running ExUnit with seed:") ? "new" : "old";
+
 const parseData = (output, coverageThreshold) => {
+  const format = detectFormat(output);
+  const parser = format === "new" ? newFormatParser : oldFormatParser;
+
   try {
     parser.pattern.lastIndex = 0;
     const groups = parser.pattern.exec(output);
diff --git a/tests/fixtures/success_03 b/tests/fixtures/success_03
new file mode 100644
index 0000000..4837bdd
--- /dev/null
+++ b/tests/fixtures/success_03
@@ -0,0 +1,25 @@
+Running ExUnit with seed: 922031, max_cases: 8
+
+.......................................
+Finished in 0.1 seconds (0.07s async, 0.03s sync)
+1 doctest, 38 tests, 0 failures
+
+Generating cover results ...
+
+Percentage | Module
+-----------|--------------------------
+   100.00% | Example.Application
+   100.00% | Example.Lists
+   100.00% | Example.Math
+   100.00% | Example.Strings
+   100.00% | ExampleWeb
+   100.00% | ExampleWeb.ConnCase
+   100.00% | ExampleWeb.Endpoint
+   100.00% | ExampleWeb.ErrorJSON
+   100.00% | ExampleWeb.IndexController
+   100.00% | ExampleWeb.Router
+-----------|--------------------------
+   100.00% | Total
+
+Generated HTML coverage results in "cover" directory
+success running the tests
diff --git a/tests/lib/parser.test.js b/tests/lib/parser.test.js
index 69c7c40..85b76cc 100644
--- a/tests/lib/parser.test.js
+++ b/tests/lib/parser.test.js
@@ -45,11 +45,14 @@ describe('parser tests', () => {
       const fixture = fs.readFileSync(file, 'utf8');
       const output = parser(fixture, 80);
 
-      const summaryFormat = /^Finished in [0-9.]+ seconds \([0-9.]+s async, [0-9.]+s sync\)$/;
-      expect(output.summary).toMatch(summaryFormat);
+      // Format for Elixir versions before 1.17
+      const oldSeedFormat = /^Randomized with seed [0-9]+$/;
+
+      // Format for Elixir versions 1.17 and later
+      const newSeedFormat = /^Running ExUnit with seed: [0-9]+(?:, max_cases: [0-9]+)?$/;
+
+      expect(oldSeedFormat.test(output.randomizedSeed) || newSeedFormat.test(output.randomizedSeed)).toBe(true);
 
-      const seedFormat = /^Randomized with seed [0-9]+$/;
-      expect(output.randomizedSeed).toMatch(seedFormat);
       expect(Number.isInteger(output.totalFailures)).toBe(true);
       expect(typeof output.totalCoverage).toBe('number');
     });