diff --git a/test/wolt_modal_sheet_test.dart b/test/wolt_modal_sheet_test.dart
index ab73b3a2..539c563a 100644
--- a/test/wolt_modal_sheet_test.dart
+++ b/test/wolt_modal_sheet_test.dart
@@ -1 +1,128 @@
-void main() {}
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:wolt_modal_sheet/wolt_modal_sheet.dart';
+
+void main() {
+  group('Creating sheet', () {
+    testWidgets('WoltModalSheet.show opens a sheet', (tester) async {
+      await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: Center(
+              child: Builder(
+                builder: (context) {
+                  return ElevatedButton(
+                    onPressed: () {
+                      WoltModalSheet.show(
+                        context: context,
+                        pageListBuilder: (context) {
+                          return <WoltModalSheetPage>[
+                            WoltModalSheetPage.withSingleChild(
+                              child: const Text('Wolt modal sheet page'),
+                            ),
+                          ];
+                        },
+                      );
+                    },
+                    child: const Text('Open sheet'),
+                  );
+
+                }
+              ),
+            )
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('Open sheet'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('Wolt modal sheet page'), findsOneWidget);
+    });
+
+    testWidgets('Empty pageListBuilder throws an error', (tester) async {
+      await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: Center(
+              child: Builder(
+                builder: (context) {
+                  return ElevatedButton(
+                    onPressed: () {
+                      WoltModalSheet.show(
+                        context: context,
+                        pageListBuilder: (context) {
+                          return <WoltModalSheetPage>[];
+                        },
+                      );
+                    },
+                    child: const Text('Open sheet'),
+                  );
+                }
+              ),
+            )
+          ),
+        ),
+      );
+
+      await tester.tap(find.text('Open sheet'));
+      await tester.pumpAndSettle();
+
+      expect(tester.takeException(), isNotNull);
+    });
+  });
+
+  testWidgets('WoltModalSheet.modalTypeBuilder defaults', (tester) async {
+    const Size wideSize = Size(800.0, 600.0);
+    const Size narrowSize = Size(300.0, 600.0);
+
+    addTearDown(tester.view.reset);
+    tester.view.physicalSize = wideSize;
+    tester.view.devicePixelRatio = 1.0;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Center(
+            child: Builder(
+              builder: (context) {
+                return ElevatedButton(
+                  onPressed: () {
+                    WoltModalSheet.show(
+                      context: context,
+                      pageListBuilder: (context) {
+                        return <WoltModalSheetPage>[
+                          WoltModalSheetPage.withSingleChild(
+                            child: const Text('Wolt modal sheet page'),
+                          ),
+                        ];
+                      },
+                    );
+                  },
+                  child: const Text('Open sheet'),
+                );
+              }
+            ),
+          )
+        ),
+      ),
+    );
+
+    await tester.tap(find.text('Open sheet'));
+    await tester.pumpAndSettle();
+
+    Finder sheetMaterial = find.byType(Material).last;
+
+    // The default modalTypeBuilder should be a dialog on wide screens.
+    expect(tester.getSize(sheetMaterial), const Size(320.0, 160.0));
+    expect(tester.getTopLeft(sheetMaterial), const Offset(240.0, 220.0));
+
+    // Configure to show the narrow layout.
+    tester.view.physicalSize = narrowSize;
+    await tester.pumpAndSettle();
+
+    // The default modalTypeBuilder should be a bottom sheet on narrow screens.
+    expect(tester.getSize(sheetMaterial), const Size(300.0, 160.0));
+    expect(tester.getTopLeft(sheetMaterial), const Offset(0.0, 440.0));
+  });
+}