diff --git a/IdentityShroud.Core.Tests/Fixtures/DbFixture.cs b/IdentityShroud.Core.Tests/Fixtures/DbFixture.cs
index 573fb8b..186094e 100644
--- a/IdentityShroud.Core.Tests/Fixtures/DbFixture.cs
+++ b/IdentityShroud.Core.Tests/Fixtures/DbFixture.cs
@@ -19,8 +19,8 @@ public class DbFixture : IAsyncLifetime
     private string Password => "password";
     private string DbHostname => _postgresqlServer.Hostname;
     private int DbPort => _postgresqlServer.GetMappedPublicPort(PostgreSqlBuilder.PostgreSqlPort);
-    
-    public Db CreateDbContext(string dbName)
+
+    public Db CreateDbContext(string dbName = "testdb")
     {
         var db = new Db(Options.Create<DbConfiguration>(new()
         {
diff --git a/IdentityShroud.Core.Tests/Services/RealmServiceTests.cs b/IdentityShroud.Core.Tests/Services/RealmServiceTests.cs
index 0ad00ef..d3b884e 100644
--- a/IdentityShroud.Core.Tests/Services/RealmServiceTests.cs
+++ b/IdentityShroud.Core.Tests/Services/RealmServiceTests.cs
@@ -1,4 +1,5 @@
 using FluentResults;
+using IdentityShroud.Core.Contracts;
 using IdentityShroud.Core.Services;
 using IdentityShroud.Core.Tests.Fixtures;
 using IdentityShroud.Core.Tests.Substitutes;
@@ -8,19 +9,20 @@ namespace IdentityShroud.Core.Tests.Services;
 
 public class RealmServiceTests : IClassFixture<DbFixture>
 {
-    private readonly Db _db;
+    private readonly DbFixture _dbFixture;
+    private readonly IEncryptionService _encryptionService = EncryptionServiceSubstitute.CreatePassthrough();
 
     public RealmServiceTests(DbFixture dbFixture)
     {
-        _db = dbFixture.CreateDbContext("realmservice");
-
-        if (!_db.Database.EnsureCreated())
-            TruncateTables();
+        _dbFixture = dbFixture;
+        using Db db = dbFixture.CreateDbContext();
+        if (!db.Database.EnsureCreated())
+            TruncateTables(db);
     }
 
-    private void TruncateTables()
+    private void TruncateTables(Db db)
     {
-        _db.Database.ExecuteSqlRaw("TRUNCATE realm CASCADE;");
+        db.Database.ExecuteSqlRaw("TRUNCATE realm CASCADE;");
     }
 
     [Theory]
@@ -28,17 +30,20 @@ public class RealmServiceTests : IClassFixture<DbFixture>
     [InlineData("a7c2a39c-3ed9-4790-826e-43bb2e5e480c")]
     public async Task Create(string? idString)
     {
+        // Setup
         Guid? realmId = null;
         if (idString is not null)
             realmId = new(idString);
-        
-        var encryptionService = EncryptionServiceSubstitute.CreatePassthrough();
-        RealmService sut = new(_db, encryptionService);
+
+        using Db db = _dbFixture.CreateDbContext();
+        RealmService sut = new(db, _encryptionService);
+        // Act
         
         var response = await sut.Create(
             new(realmId, "slug", "New realm"),
             TestContext.Current.CancellationToken);
         
+        // Verify
         RealmCreateResponse val = ResultAssert.Success(response);
         if (realmId.HasValue)
             Assert.Equal(realmId, val.Id);
@@ -50,4 +55,33 @@ public class RealmServiceTests : IClassFixture<DbFixture>
         
         // TODO verify data has been stored!
     }
+
+    [Theory]
+    [InlineData("slug", null)]
+    [InlineData("foo", "Foo")]
+    public async Task FindBySlug(string slug, string? name)
+    {
+        using (var setupContext = _dbFixture.CreateDbContext())
+        {
+            setupContext.Realms.Add(new()
+            {
+                Slug = "foo",
+                Name = "Foo",
+            });
+            setupContext.Realms.Add(new()
+            {
+                Slug = "bar",
+                Name = "Bar",
+            });
+            
+            await setupContext.SaveChangesAsync(TestContext.Current.CancellationToken);
+        }
+
+        using Db actContext = _dbFixture.CreateDbContext();
+        RealmService sut = new(actContext, _encryptionService);
+        // Act
+        var result = await sut.FindBySlug(slug, TestContext.Current.CancellationToken);
+
+        Assert.Equal(name, result?.Name);
+    }
 }
\ No newline at end of file
diff --git a/IdentityShroud.Core/Services/RealmService.cs b/IdentityShroud.Core/Services/RealmService.cs
index 00de987..7ed114a 100644
--- a/IdentityShroud.Core/Services/RealmService.cs
+++ b/IdentityShroud.Core/Services/RealmService.cs
@@ -3,6 +3,7 @@ using IdentityShroud.Core.Contracts;
 using IdentityShroud.Core.Helpers;
 using IdentityShroud.Core.Messages.Realm;
 using IdentityShroud.Core.Model;
+using Microsoft.EntityFrameworkCore;
 
 namespace IdentityShroud.Core.Services;
 
@@ -12,9 +13,9 @@ public class RealmService(
     Db db,
     IEncryptionService encryptionService) : IRealmService
 {
-    public Task<Realm?> FindBySlug(string slug, CancellationToken ct = default)
+    public async Task<Realm?> FindBySlug(string slug, CancellationToken ct = default)
     {
-        throw new NotImplementedException();
+        return await db.Realms.SingleOrDefaultAsync(r => r.Slug == slug, ct);
     }
 
     public async Task<Result<RealmCreateResponse>> Create(RealmCreateRequest request, CancellationToken ct = default)
@@ -26,8 +27,6 @@ public class RealmService(
             Name = request.Name,
             Keys = [ CreateKey() ],
         };
-        
-        
 
         db.Add(realm);
         await db.SaveChangesAsync(ct);