diff --git a/app/Mail/InvitedToSpace.php b/app/Mail/InvitedToSpace.php
index 51e1b76b..7385a58a 100644
--- a/app/Mail/InvitedToSpace.php
+++ b/app/Mail/InvitedToSpace.php
@@ -12,11 +12,10 @@ class InvitedToSpace extends Mailable
     use Queueable;
     use SerializesModels;
 
-    protected $invite;
-
-    public function __construct(SpaceInvite $invite)
-    {
-        $this->invite = $invite;
+    public function __construct(
+        protected SpaceInvite $invite,
+    ) {
+        //
     }
 
     public function build()
diff --git a/app/Mail/PasswordChanged.php b/app/Mail/PasswordChanged.php
index 6b9d7f18..a0202ade 100644
--- a/app/Mail/PasswordChanged.php
+++ b/app/Mail/PasswordChanged.php
@@ -11,11 +11,10 @@ class PasswordChanged extends Mailable
     use Queueable;
     use SerializesModels;
 
-    protected $updated_at;
-
-    public function __construct($updated_at)
-    {
-        $this->updated_at = $updated_at;
+    public function __construct(
+        protected $updated_at,
+    ) {
+        //
     }
 
     public function build()
diff --git a/app/Mail/ResetPassword.php b/app/Mail/ResetPassword.php
index 63c2f704..b0e614b1 100644
--- a/app/Mail/ResetPassword.php
+++ b/app/Mail/ResetPassword.php
@@ -11,11 +11,10 @@ class ResetPassword extends Mailable
     use Queueable;
     use SerializesModels;
 
-    protected $token;
-
-    public function __construct($token)
-    {
-        $this->token = $token;
+    public function __construct(
+        protected $token,
+    ) {
+        //
     }
 
     public function build()
diff --git a/app/Mail/VerifyRegistration.php b/app/Mail/VerifyRegistration.php
index 0e65557d..b20c7f17 100644
--- a/app/Mail/VerifyRegistration.php
+++ b/app/Mail/VerifyRegistration.php
@@ -12,11 +12,10 @@ class VerifyRegistration extends Mailable
     use Queueable;
     use SerializesModels;
 
-    protected $user;
-
-    public function __construct(User $user)
-    {
-        $this->user = $user;
+    public function __construct(
+        protected User $user,
+    ) {
+        //
     }
 
     public function build()
diff --git a/app/Mail/WeeklyReport.php b/app/Mail/WeeklyReport.php
index 2f9fe593..c81f5375 100644
--- a/app/Mail/WeeklyReport.php
+++ b/app/Mail/WeeklyReport.php
@@ -12,17 +12,13 @@ class WeeklyReport extends Mailable
     use Queueable;
     use SerializesModels;
 
-    protected $space;
-    protected $week;
-    protected $totalSpent;
-    protected $largestSpendingWithTag;
-
-    public function __construct(Space $space, $week, $totalSpent, $largestSpendingWithTag)
-    {
-        $this->space = $space;
-        $this->week = $week;
-        $this->totalSpent = $totalSpent;
-        $this->largestSpendingWithTag = $largestSpendingWithTag;
+    public function __construct(
+        protected Space $space,
+        protected $week,
+        protected $totalSpent,
+        protected $largestSpendingWithTag
+    ) {
+        //
     }
 
     public function build()
diff --git a/resources/views/emails/invited_to_space_plain.blade.php b/resources/views/emails/invited_to_space_plain.blade.php
index eb0a0490..16cd1cc7 100644
--- a/resources/views/emails/invited_to_space_plain.blade.php
+++ b/resources/views/emails/invited_to_space_plain.blade.php
@@ -1,4 +1,4 @@
-{{ $invite->inviter->name }} has invited you to "{{ $invite->space->name }}"
+{{ $invite->inviter->name }} has invited you to "{{ $invite->space->name }}".
 
 Use the link below to check out your invite.
 
diff --git a/tests/Unit/Mail/InvitedToSpaceTest.php b/tests/Unit/Mail/InvitedToSpaceTest.php
new file mode 100644
index 00000000..761d3db2
--- /dev/null
+++ b/tests/Unit/Mail/InvitedToSpaceTest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\InvitedToSpace;
+use App\Models\Space;
+use App\Models\SpaceInvite;
+use App\Models\User;
+use Tests\TestCase;
+
+class InvitedToSpaceTest extends TestCase
+{
+    public function testMailable(): void
+    {
+        $space = Space::factory()
+            ->create([
+                'name' => 'Foo Bar',
+            ]);
+
+        $inviterUser = User::factory()
+            ->create([
+                'name' => 'John Doe',
+            ]);
+
+        $spaceInvite = SpaceInvite::factory()
+            ->create([
+                'space_id' => $space->id,
+                'inviter_user_id' => $inviterUser->id,
+            ]);
+
+        $mailable = new InvitedToSpace($spaceInvite);
+
+        $mailable
+            ->assertSeeInText('John Doe has invited you to "Foo Bar".')
+            ->assertSeeInHtml('<a href="' . config('app.url') . '/spaces/' . $space->id . '/invites/' . $spaceInvite->id . '">Check out your invite</a>', false); // phpcs:ignore
+    }
+}
diff --git a/tests/Unit/Mail/PasswordChangedTest.php b/tests/Unit/Mail/PasswordChangedTest.php
new file mode 100644
index 00000000..c557f9b1
--- /dev/null
+++ b/tests/Unit/Mail/PasswordChangedTest.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\PasswordChanged;
+use Tests\TestCase;
+
+class PasswordChangedTest extends TestCase
+{
+    public function testMailable(): void
+    {
+        $mailable = new PasswordChanged('2023-12-05 18:00:00');
+
+        $mailable->assertSeeInText('Heads up! Your password has been changed (2023-12-05 18:00:00 CEST).');
+    }
+}
diff --git a/tests/Unit/Mail/ResetPasswordTest.php b/tests/Unit/Mail/ResetPasswordTest.php
new file mode 100644
index 00000000..00785135
--- /dev/null
+++ b/tests/Unit/Mail/ResetPasswordTest.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\ResetPassword;
+use Tests\TestCase;
+
+class ResetPasswordTest extends TestCase
+{
+    public function testMailable(): void
+    {
+        $mailable = new ResetPassword('123456789');
+
+        $mailable->assertSeeInHtml('<a href="' . config('app.url') . '/reset_password?token=123456789">Click here to change your password</a>', false); // phpcs:ignore
+    }
+}
diff --git a/tests/Unit/Mail/VerifyRegistrationTest.php b/tests/Unit/Mail/VerifyRegistrationTest.php
new file mode 100644
index 00000000..54454ef1
--- /dev/null
+++ b/tests/Unit/Mail/VerifyRegistrationTest.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\VerifyRegistration;
+use App\Models\User;
+use Tests\TestCase;
+
+class VerifyRegistrationTest extends TestCase
+{
+    public function testMailable(): void
+    {
+        $user = User::factory()
+            ->create([
+                'name' => 'John Doe',
+                'verification_token' => 'abc123',
+            ]);
+
+        $mailable = new VerifyRegistration($user);
+
+        $mailable
+            ->assertSeeInText('Welcome aboard, John Doe')
+            ->assertSeeInText('We\'re going to help you get insight into your personal finances.')
+            ->assertSeeInText('No more dealing with pesky, half-assed spreadsheets.')
+            ->assertSeeInHtml('<a href="' . config('app.url') . '/verify/abc123">Verify</a>', false);
+    }
+}
diff --git a/tests/Unit/Mail/WeeklyReportTest.php b/tests/Unit/Mail/WeeklyReportTest.php
new file mode 100644
index 00000000..4b56410f
--- /dev/null
+++ b/tests/Unit/Mail/WeeklyReportTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\WeeklyReport;
+use App\Models\Space;
+use Tests\TestCase;
+
+class WeeklyReportTest extends TestCase
+{
+    public function testMailableUsingSpaceWithoutTransactions(): void
+    {
+        $space = Space::factory()
+            ->create([
+                'currency_id' => 2, // Should be USD
+                'name' => 'Foo Bar',
+            ]);
+
+        $mailable = new WeeklyReport(
+            space: $space,
+            week: 5,
+            totalSpent: 0,
+            largestSpendingWithTag: [],
+        );
+
+        $mailable
+            ->assertSeeInText('Here\'s your weekly report for Foo Bar')
+            ->assertSeeInText('This week (#5) you\'ve')
+            ->assertSeeInText('- Spent &dollar; 0.00')
+            ->assertDontSeeInText('Most of which you\'ve spent on');
+    }
+
+    public function testMailableUsingSpaceWithTransactions(): void
+    {
+        $space = Space::factory()
+            ->create([
+                'currency_id' => 2, // Should be USD
+                'name' => 'Foo Bar',
+            ]);
+
+        $mailable = new WeeklyReport(
+            space: $space,
+            week: 5,
+            totalSpent: 10000,
+            largestSpendingWithTag: [(object) ['amount' => 7000, 'tag_name' => 'Insurance']],
+        );
+
+        $mailable
+            ->assertSeeInText('Here\'s your weekly report for Foo Bar')
+            ->assertSeeInText('This week (#5) you\'ve')
+            ->assertSeeInText('- Spent &dollar; 100.00')
+            ->assertSeeInText('- Most of which you\'ve spent on Insurance (&dollar; 70.00)');
+    }
+}