diff --git a/.changeset/real-parrots-chew.md b/.changeset/real-parrots-chew.md
new file mode 100644
index 0000000..6f5d15c
--- /dev/null
+++ b/.changeset/real-parrots-chew.md
@@ -0,0 +1,5 @@
+---
+'@emigrate/cli': patch
+---
+
+Support stored migration histories that have only stored the migration file names without file extension and assume it's .js files in that case. This is to be compatible with a migration history generated by Immigration.
diff --git a/packages/cli/src/collect-migrations.ts b/packages/cli/src/collect-migrations.ts
index d583a44..dc1ce8f 100644
--- a/packages/cli/src/collect-migrations.ts
+++ b/packages/cli/src/collect-migrations.ts
@@ -1,3 +1,4 @@
+import { extname } from 'node:path';
 import { type MigrationHistoryEntry, type MigrationMetadata, type MigrationMetadataFinished } from '@emigrate/types';
 import { toMigrationMetadata } from './to-migration-metadata.js';
 import { getMigrations as getMigrationsOriginal } from './get-migrations.js';
@@ -11,7 +12,9 @@ export async function* collectMigrations(
   const allMigrations = await getMigrations(cwd, directory);
   const seen = new Set<string>();
 
-  for await (const entry of history) {
+  for await (const entry_ of history) {
+    const entry = extname(entry_.name) === '' ? { ...entry_, name: `${entry_.name}.js` } : entry_;
+
     const index = allMigrations.findIndex((migrationFile) => migrationFile.name === entry.name);
 
     if (index === -1) {
diff --git a/packages/cli/src/commands/up.test.ts b/packages/cli/src/commands/up.test.ts
index fe88b74..5cdae25 100644
--- a/packages/cli/src/commands/up.test.ts
+++ b/packages/cli/src/commands/up.test.ts
@@ -48,6 +48,60 @@ describe('up', () => {
     assert.deepStrictEqual(reporter.onFinished.mock.calls[0]?.arguments, [[], undefined]);
   });
 
+  it('returns 0 and finishes without an error when all migrations have already been run', async () => {
+    const { reporter, run } = getUpCommand(['my_migration.js'], getStorage(['my_migration.js']));
+
+    const exitCode = await run();
+
+    assert.strictEqual(exitCode, 0);
+    assert.strictEqual(reporter.onInit.mock.calls.length, 1);
+    assert.deepStrictEqual(reporter.onInit.mock.calls[0]?.arguments, [
+      {
+        command: 'up',
+        cwd: '/emigrate',
+        dry: false,
+        color: undefined,
+        version,
+        directory: 'migrations',
+      },
+    ]);
+    assert.strictEqual(reporter.onCollectedMigrations.mock.calls.length, 1);
+    assert.strictEqual(reporter.onLockedMigrations.mock.calls.length, 1);
+    assert.strictEqual(reporter.onMigrationStart.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationSuccess.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationError.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationSkip.mock.calls.length, 0);
+    assert.strictEqual(reporter.onFinished.mock.calls.length, 1);
+    assert.deepStrictEqual(reporter.onFinished.mock.calls[0]?.arguments, [[], undefined]);
+  });
+
+  it('returns 0 and finishes without an error when all migrations have already been run even when the history responds without file extensions', async () => {
+    const { reporter, run } = getUpCommand(['my_migration.js'], getStorage(['my_migration']));
+
+    const exitCode = await run();
+
+    assert.strictEqual(exitCode, 0);
+    assert.strictEqual(reporter.onInit.mock.calls.length, 1);
+    assert.deepStrictEqual(reporter.onInit.mock.calls[0]?.arguments, [
+      {
+        command: 'up',
+        cwd: '/emigrate',
+        dry: false,
+        color: undefined,
+        version,
+        directory: 'migrations',
+      },
+    ]);
+    assert.strictEqual(reporter.onCollectedMigrations.mock.calls.length, 1);
+    assert.strictEqual(reporter.onLockedMigrations.mock.calls.length, 1);
+    assert.strictEqual(reporter.onMigrationStart.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationSuccess.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationError.mock.calls.length, 0);
+    assert.strictEqual(reporter.onMigrationSkip.mock.calls.length, 0);
+    assert.strictEqual(reporter.onFinished.mock.calls.length, 1);
+    assert.deepStrictEqual(reporter.onFinished.mock.calls[0]?.arguments, [[], undefined]);
+  });
+
   it('returns 1 and finishes with an error when there are migration file extensions without a corresponding loader plugin', async () => {
     const { reporter, run } = getUpCommand(['some_other.js', 'some_file.sql'], getStorage([]));
 
diff --git a/packages/cli/src/get-migrations.ts b/packages/cli/src/get-migrations.ts
index 735fc49..e208ac7 100644
--- a/packages/cli/src/get-migrations.ts
+++ b/packages/cli/src/get-migrations.ts
@@ -23,7 +23,10 @@ export const getMigrations = async (cwd: string, directory: string): Promise<Mig
   const allFilesInMigrationDirectory = await tryReadDirectory(directoryPath);
 
   const migrationFiles: MigrationMetadata[] = allFilesInMigrationDirectory
-    .filter((file) => file.isFile() && !file.name.startsWith('.') && !file.name.startsWith('_'))
+    .filter(
+      (file) =>
+        file.isFile() && !file.name.startsWith('.') && !file.name.startsWith('_') && path.extname(file.name) !== '',
+    )
     .sort((a, b) => a.name.localeCompare(b.name))
     .map(({ name }) => {
       const filePath = path.join(directoryPath, name);