diff --git a/samples/ConsoleApp/Program.cs b/samples/ConsoleApp/Program.cs
index bc824fb..7fde19e 100644
--- a/samples/ConsoleApp/Program.cs
+++ b/samples/ConsoleApp/Program.cs
@@ -20,7 +20,7 @@
 {
     for (int i = 1; i <= 5; ++i)
     {
-        Console.Write($"Try: {i}: {url} ");
+        Console.Write($"Attempt: {i}: {url} ");
 
         var stopwatch = Stopwatch.StartNew();
         var result = await httpClient.GetAsync(url);
diff --git a/src/HttpClient.Cache/CacheDataExtensions.cs b/src/HttpClient.Cache/CacheDataExtensions.cs
index cce68fe..edab7d6 100644
--- a/src/HttpClient.Cache/CacheDataExtensions.cs
+++ b/src/HttpClient.Cache/CacheDataExtensions.cs
@@ -3,9 +3,9 @@
 
 namespace HttpClient.Cache;
 
-public static class CacheDataExtensions
+internal static class CacheDataExtensions
 {
-    public static byte[] Pack(this CacheData cacheData)
+    internal static byte[] Pack(this CacheData cacheData)
     {
         var json =  JsonConvert.SerializeObject(cacheData);
         var bytes = new byte[json.Length * sizeof(char)];
@@ -14,7 +14,7 @@ public static byte[] Pack(this CacheData cacheData)
         return bytes;
     }
 
-    public static CacheData? Unpack(this byte[] cacheData)
+    internal static CacheData? Unpack(this byte[] cacheData)
     {
         try
         {
diff --git a/src/HttpClient.Cache/CacheEntryExtensions.cs b/src/HttpClient.Cache/CacheEntryExtensions.cs
index 590dc7a..808e7ee 100644
--- a/src/HttpClient.Cache/CacheEntryExtensions.cs
+++ b/src/HttpClient.Cache/CacheEntryExtensions.cs
@@ -1,8 +1,8 @@
 namespace HttpClient.Cache;
 
-public static class CacheEntryExtensions
+internal static class CacheEntryExtensions
 {
-    public static ICacheEntry AddExpirationToken(this ICacheEntry entry, IChangeToken token)
+    internal static ICacheEntry AddExpirationToken(this ICacheEntry entry, IChangeToken token)
     {
         if (token == null)
         {
diff --git a/src/HttpClient.Cache/InMemory/Clock/SystemClock.cs b/src/HttpClient.Cache/InMemory/Clock/SystemClock.cs
index 8cbccef..3e768cc 100644
--- a/src/HttpClient.Cache/InMemory/Clock/SystemClock.cs
+++ b/src/HttpClient.Cache/InMemory/Clock/SystemClock.cs
@@ -1,6 +1,6 @@
 namespace HttpClient.Cache.InMemory.Clock;
 
-public class SystemClock: ISystemClock
+internal class SystemClock: ISystemClock
 {
     public DateTimeOffset UtcNow => DateTimeOffset.UtcNow;
 }
\ No newline at end of file
diff --git a/src/HttpClient.Cache/InMemory/MemoryCacheExtensions.cs b/src/HttpClient.Cache/InMemory/MemoryCacheExtensions.cs
index 49a8f32..145c278 100644
--- a/src/HttpClient.Cache/InMemory/MemoryCacheExtensions.cs
+++ b/src/HttpClient.Cache/InMemory/MemoryCacheExtensions.cs
@@ -2,7 +2,7 @@
 
 namespace HttpClient.Cache.InMemory;
 
-public static class MemoryCacheExtensions
+internal static class MemoryCacheExtensions
 {
     public static Task<bool> TryGetAsync(this IMemoryCache cache, string key, out CacheData? cacheData)
     {
diff --git a/src/HttpClient.Cache/InMemory/MemoryCacheOptions.cs b/src/HttpClient.Cache/InMemory/MemoryCacheOptions.cs
index bd61cbc..4f9f99f 100644
--- a/src/HttpClient.Cache/InMemory/MemoryCacheOptions.cs
+++ b/src/HttpClient.Cache/InMemory/MemoryCacheOptions.cs
@@ -4,7 +4,7 @@ namespace HttpClient.Cache.InMemory;
 
 public class MemoryCacheOptions
 {
-    public TimeSpan ExpirationScanFrequency { get; } = TimeSpan.FromMinutes(1.0);
-    
-    public ISystemClock? Clock { get; set; }
+    public TimeSpan ExpirationScanFrequency { get; set; } = TimeSpan.FromSeconds(1.0);
+
+    public ISystemClock Clock { get; set; } = new SystemClock();
 }
\ No newline at end of file
diff --git a/src/HttpClient.Cache/Utils/HttpStatusCodeExtensions.cs b/src/HttpClient.Cache/Utils/HttpStatusCodeExtensions.cs
index 5ea3820..f7d6627 100644
--- a/src/HttpClient.Cache/Utils/HttpStatusCodeExtensions.cs
+++ b/src/HttpClient.Cache/Utils/HttpStatusCodeExtensions.cs
@@ -2,7 +2,7 @@
 
 namespace HttpClient.Cache.Utils;
 
-public static class HttpStatusCodeExtensions
+internal static class HttpStatusCodeExtensions
 {
     public static TimeSpan GetAbsoluteExpirationRelativeToNow(this HttpStatusCode statusCode,
         IDictionary<HttpStatusCode, TimeSpan> mapping)
@@ -13,11 +13,8 @@ public static TimeSpan GetAbsoluteExpirationRelativeToNow(this HttpStatusCode st
         }
         
         var code = (int)statusCode;
-        if (mapping.TryGetValue((HttpStatusCode)(Math.Floor(code / 100.0) * 100), out expiration))
-        {
-            return expiration;
-        }
-
-        return TimeSpan.FromDays(1);
+        return mapping.TryGetValue((HttpStatusCode)(Math.Floor(code / 100.0) * 100), out expiration) 
+            ? expiration 
+            : TimeSpan.FromDays(1);
     }
 }
\ No newline at end of file