diff --git a/appveyor.yml b/appveyor.yml
index 22176d39..9f2857ae 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,13 +1,11 @@
 image:
-#- Visual Studio 2013
-#- Visual Studio 2015
 - Visual Studio 2017
 #- Visual Studio 2017 Preview
 
 platform:
 - x64
 - x86
-- Any CPU
+#- Any CPU
 
 configuration:
  - Debug
@@ -33,7 +31,8 @@ install:
 build_script:
   - cmd: mkdir build
   - cmd: cd build
-  - cmd: cmake .. -G "Ninja" -DBUILD_TESTING=on -DBOOST_ROOT="C:/Libraries/boost_1_65_1" -DDOKAN_PATH="C:/Program Files/Dokan/DokanLibrary-1.1.0"
+  # note: The cmake+ninja workflow requires us to set build type in both cmake commands ('cmake' and 'cmake --build'), otherwise the cryfs.exe will depend on debug versions of the visual studio c++ runtime (i.e. msvcp140d.dll)
+  - cmd: cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=%CONFIGURATION% -DBUILD_TESTING=on -DBOOST_ROOT="C:/Libraries/boost_1_65_1" -DDOKAN_PATH="C:/Program Files/Dokan/DokanLibrary-1.1.0"
   - cmd: cmake --build . --config %CONFIGURATION%
   - cmd: .\test\gitversion\gitversion-test.exe
   # cpp-utils-test disables ThreadDebuggingTest_ThreadName.*_thenIsCorrect because the appveyor image is too old to support the API needed for that
diff --git a/src/blockstore/implementations/compressing/CompressedBlock.h b/src/blockstore/implementations/compressing/CompressedBlock.h
index 32209dba..56f0f4dc 100644
--- a/src/blockstore/implementations/compressing/CompressedBlock.h
+++ b/src/blockstore/implementations/compressing/CompressedBlock.h
@@ -2,8 +2,6 @@
 #ifndef MESSMER_BLOCKSTORE_IMPLEMENTATIONS_COMPRESSING_COMPRESSEDBLOCK_H_
 #define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_COMPRESSING_COMPRESSEDBLOCK_H_
 
-#include "cpp-utils/crypto/cryptopp_byte.h"
-
 #include "../../interface/Block.h"
 #include "../../interface/BlockStore.h"
 #include <cpp-utils/data/DataUtils.h>
diff --git a/src/blockstore/implementations/compressing/compressors/Gzip.cpp b/src/blockstore/implementations/compressing/compressors/Gzip.cpp
index 67b7f49a..5420ebf5 100644
--- a/src/blockstore/implementations/compressing/compressors/Gzip.cpp
+++ b/src/blockstore/implementations/compressing/compressors/Gzip.cpp
@@ -1,4 +1,3 @@
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "Gzip.h"
 #include <vendor_cryptopp/gzip.h>
 
diff --git a/src/blockstore/implementations/encrypted/EncryptedBlockStore2.h b/src/blockstore/implementations/encrypted/EncryptedBlockStore2.h
index 26e25cad..95194fb2 100644
--- a/src/blockstore/implementations/encrypted/EncryptedBlockStore2.h
+++ b/src/blockstore/implementations/encrypted/EncryptedBlockStore2.h
@@ -3,7 +3,6 @@
 #define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_ENCRYPTED_ENCRYPTEDBLOCKSTORE2_H_
 
 #include "../../interface/BlockStore2.h"
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include <cpp-utils/macros.h>
 #include <cpp-utils/crypto/symmetric/Cipher.h>
 #include <cpp-utils/data/SerializationHelper.h>
diff --git a/src/cpp-utils/crypto/cryptopp_byte.h b/src/cpp-utils/crypto/cryptopp_byte.h
deleted file mode 100644
index e00cf7cf..00000000
--- a/src/cpp-utils/crypto/cryptopp_byte.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#pragma once
-#ifndef _CPPUTILS_CRYPTO_CRYPTOPP_BYTE_H
-#define _CPPUTILS_CRYPTO_CRYPTOPP_BYTE_H
-
-#include <vendor_cryptopp/cryptlib.h>
-
-// If we're running an older CryptoPP version, CryptoPP::byte isn't defined yet.
-// Define it. Refer to "byte" type in the global namespace (placed by CryptoPP).
-// Could also use CRYPTOPP_NO_GLOBAL_BYTE - but don't want to track when it was
-// introduced. This way seems more reliable, as it is compatible with more of
-// the Crypto++ versions.
-#if CRYPTOPP_VERSION < 600
-namespace CryptoPP {
-   using byte = ::byte;
-}
-#endif /* CRYPTOPP_VERSION < 600 */
-
-#endif /* _CPPUTILS_CRYPTO_CRYPTOPP_BYTE_H */
diff --git a/src/cpp-utils/crypto/symmetric/CFB_Cipher.h b/src/cpp-utils/crypto/symmetric/CFB_Cipher.h
index 4f91b893..80ff2568 100644
--- a/src/cpp-utils/crypto/symmetric/CFB_Cipher.h
+++ b/src/cpp-utils/crypto/symmetric/CFB_Cipher.h
@@ -2,7 +2,6 @@
 #ifndef MESSMER_CPPUTILS_CRYPTO_SYMMETRIC_CFBCIPHER_H_
 #define MESSMER_CPPUTILS_CRYPTO_SYMMETRIC_CFBCIPHER_H_
 
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "../../data/FixedSizeData.h"
 #include "../../data/Data.h"
 #include "../../random/Random.h"
diff --git a/src/cpp-utils/crypto/symmetric/EncryptionKey.h b/src/cpp-utils/crypto/symmetric/EncryptionKey.h
index 7a9960e0..899a4b40 100644
--- a/src/cpp-utils/crypto/symmetric/EncryptionKey.h
+++ b/src/cpp-utils/crypto/symmetric/EncryptionKey.h
@@ -5,7 +5,6 @@
 #include <cpp-utils/data/FixedSizeData.h>
 #include <memory>
 #include <cpp-utils/system/memory.h>
-#include "../cryptopp_byte.h"
 #include <cpp-utils/random/RandomGenerator.h>
 
 namespace cpputils {
diff --git a/src/cpp-utils/crypto/symmetric/GCM_Cipher.h b/src/cpp-utils/crypto/symmetric/GCM_Cipher.h
index 21d55fb6..13300bb8 100644
--- a/src/cpp-utils/crypto/symmetric/GCM_Cipher.h
+++ b/src/cpp-utils/crypto/symmetric/GCM_Cipher.h
@@ -2,7 +2,6 @@
 #ifndef MESSMER_CPPUTILS_CRYPTO_SYMMETRIC_GCMCIPHER_H_
 #define MESSMER_CPPUTILS_CRYPTO_SYMMETRIC_GCMCIPHER_H_
 
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "../../data/FixedSizeData.h"
 #include "../../data/Data.h"
 #include "../../random/Random.h"
diff --git a/src/cpp-utils/crypto/symmetric/ciphers.cpp b/src/cpp-utils/crypto/symmetric/ciphers.cpp
index fa5dcaa9..f0f5017f 100644
--- a/src/cpp-utils/crypto/symmetric/ciphers.cpp
+++ b/src/cpp-utils/crypto/symmetric/ciphers.cpp
@@ -23,12 +23,8 @@ namespace cpputils {
     DEFINE_CIPHER(Cast256_GCM);
     DEFINE_CIPHER(Cast256_CFB);
 
-#if CRYPTOPP_VERSION != 564
     DEFINE_CIPHER(Mars448_GCM);
     DEFINE_CIPHER(Mars448_CFB);
-#else
-# warning "You're using Crypto++ 5.6.4. In this version, the MARS-448 cipher is not available. Your CryFS executable will not be able to load file systems using this cipher. Please use Crypto++ 5.6.3 or 5.6.5+ instead."
-#endif
     DEFINE_CIPHER(Mars256_GCM);
     DEFINE_CIPHER(Mars256_CFB);
     DEFINE_CIPHER(Mars128_GCM);
diff --git a/src/cpp-utils/crypto/symmetric/ciphers.h b/src/cpp-utils/crypto/symmetric/ciphers.h
index 7a8f8d45..a2059e13 100644
--- a/src/cpp-utils/crypto/symmetric/ciphers.h
+++ b/src/cpp-utils/crypto/symmetric/ciphers.h
@@ -41,11 +41,9 @@ static_assert(32 == CryptoPP::CAST256::MAX_KEYLENGTH, "If Cast offered larger ke
 DECLARE_CIPHER(Cast256_GCM, "cast-256-gcm", GCM_Cipher, CryptoPP::CAST256, 32);
 DECLARE_CIPHER(Cast256_CFB, "cast-256-cfb", CFB_Cipher, CryptoPP::CAST256, 32);
 
-#if CRYPTOPP_VERSION != 564
 static_assert(56 == CryptoPP::MARS::MAX_KEYLENGTH, "If Mars offered larger keys, we should offer a variant with it");
 DECLARE_CIPHER(Mars448_GCM, "mars-448-gcm", GCM_Cipher, CryptoPP::MARS, 56);
 DECLARE_CIPHER(Mars448_CFB, "mars-448-cfb", CFB_Cipher, CryptoPP::MARS, 56);
-#endif
 DECLARE_CIPHER(Mars256_GCM, "mars-256-gcm", GCM_Cipher, CryptoPP::MARS, 32);
 DECLARE_CIPHER(Mars256_CFB, "mars-256-cfb", CFB_Cipher, CryptoPP::MARS, 32);
 DECLARE_CIPHER(Mars128_GCM, "mars-128-gcm", GCM_Cipher, CryptoPP::MARS, 16);
diff --git a/src/cpp-utils/crypto/symmetric/testutils/FakeAuthenticatedCipher.h b/src/cpp-utils/crypto/symmetric/testutils/FakeAuthenticatedCipher.h
index 4305ef02..a37cffd8 100644
--- a/src/cpp-utils/crypto/symmetric/testutils/FakeAuthenticatedCipher.h
+++ b/src/cpp-utils/crypto/symmetric/testutils/FakeAuthenticatedCipher.h
@@ -2,7 +2,6 @@
 #ifndef MESSMER_CPPUTILS_TEST_CRYPTO_SYMMETRIC_TESTUTILS_FAKEAUTHENTICATEDCIPHER_H_
 #define MESSMER_CPPUTILS_TEST_CRYPTO_SYMMETRIC_TESTUTILS_FAKEAUTHENTICATEDCIPHER_H_
 
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "cpp-utils/crypto/symmetric/Cipher.h"
 #include "cpp-utils/data/FixedSizeData.h"
 #include "cpp-utils/data/Data.h"
diff --git a/src/cpp-utils/data/Data.cpp b/src/cpp-utils/data/Data.cpp
index c8a3a25b..be94cdbe 100644
--- a/src/cpp-utils/data/Data.cpp
+++ b/src/cpp-utils/data/Data.cpp
@@ -1,7 +1,6 @@
 #include "Data.h"
 #include <stdexcept>
 #include <vendor_cryptopp/hex.h>
-#include <cpp-utils/crypto/cryptopp_byte.h>
 
 using std::istream;
 using std::ofstream;
diff --git a/src/cpp-utils/random/OSRandomGenerator.h b/src/cpp-utils/random/OSRandomGenerator.h
index 18a8002d..f522c617 100644
--- a/src/cpp-utils/random/OSRandomGenerator.h
+++ b/src/cpp-utils/random/OSRandomGenerator.h
@@ -2,7 +2,6 @@
 #ifndef MESSMER_CPPUTILS_RANDOM_OSRANDOMGENERATOR_H
 #define MESSMER_CPPUTILS_RANDOM_OSRANDOMGENERATOR_H
 
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "RandomGenerator.h"
 #include <vendor_cryptopp/osrng.h>
 
diff --git a/src/cpp-utils/random/RandomGeneratorThread.cpp b/src/cpp-utils/random/RandomGeneratorThread.cpp
index 8d436dd5..99804a37 100644
--- a/src/cpp-utils/random/RandomGeneratorThread.cpp
+++ b/src/cpp-utils/random/RandomGeneratorThread.cpp
@@ -1,4 +1,3 @@
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include "RandomGeneratorThread.h"
 
 namespace cpputils {
diff --git a/src/cryfs/config/CryCipher.cpp b/src/cryfs/config/CryCipher.cpp
index 81f233c5..52749847 100644
--- a/src/cryfs/config/CryCipher.cpp
+++ b/src/cryfs/config/CryCipher.cpp
@@ -73,10 +73,8 @@ const vector<shared_ptr<CryCipher>> CryCiphers::SUPPORTED_CIPHERS = {
         make_shared<CryCipherInstance<Serpent128_CFB>>(INTEGRITY_WARNING),
         make_shared<CryCipherInstance<Cast256_GCM>>(),
         make_shared<CryCipherInstance<Cast256_CFB>>(INTEGRITY_WARNING),
-#if CRYPTOPP_VERSION != 564
         make_shared<CryCipherInstance<Mars448_GCM>>(),
         make_shared<CryCipherInstance<Mars448_CFB>>(INTEGRITY_WARNING),
-#endif
         make_shared<CryCipherInstance<Mars256_GCM>>(),
         make_shared<CryCipherInstance<Mars256_CFB>>(INTEGRITY_WARNING),
         make_shared<CryCipherInstance<Mars128_GCM>>(),
diff --git a/test/blockstore/implementations/encrypted/EncryptedBlockStoreTest_Specific.cpp b/test/blockstore/implementations/encrypted/EncryptedBlockStoreTest_Specific.cpp
index 82099074..840532f7 100644
--- a/test/blockstore/implementations/encrypted/EncryptedBlockStoreTest_Specific.cpp
+++ b/test/blockstore/implementations/encrypted/EncryptedBlockStoreTest_Specific.cpp
@@ -1,4 +1,3 @@
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include <gtest/gtest.h>
 #include "cpp-utils/crypto/symmetric/testutils/FakeAuthenticatedCipher.h"
 #include "blockstore/implementations/encrypted/EncryptedBlockStore2.h"
diff --git a/test/cpp-utils/assert/assert_debug_test.cpp b/test/cpp-utils/assert/assert_debug_test.cpp
index 97c60268..8a214992 100644
--- a/test/cpp-utils/assert/assert_debug_test.cpp
+++ b/test/cpp-utils/assert/assert_debug_test.cpp
@@ -1,6 +1,10 @@
 #include <gtest/gtest.h>
 #include <gmock/gmock.h>
 
+#ifdef NDEBUG
+#define _REAL_NDEBUG
+#endif
+
 //Include the ASSERT macro for a debug build
 #undef NDEBUG
 #include "cpp-utils/assert/assert.h"
@@ -29,9 +33,18 @@ constexpr const char* EXPECTED = R"(Assertion \[2==5\] failed in .*assert_debug_
     );
 }
 
+#if !(defined(_MSC_VER) && defined(_REAL_NDEBUG))
 TEST(AssertTest_DebugBuild, AssertMessageContainsBacktrace) {
     EXPECT_DEATH(
         ASSERT(2==5, "my message"),
         "cpputils::"
     );
 }
+#else
+TEST(AssertTest_DebugBuild, AssertMessageContainsBacktrace) {
+    EXPECT_DEATH(
+        ASSERT(2==5, "my message"),
+        "#1"
+    );
+}
+#endif
diff --git a/test/cpp-utils/assert/assert_release_test.cpp b/test/cpp-utils/assert/assert_release_test.cpp
index 3b814e68..17a43fb3 100644
--- a/test/cpp-utils/assert/assert_release_test.cpp
+++ b/test/cpp-utils/assert/assert_release_test.cpp
@@ -2,6 +2,10 @@
 #include <gmock/gmock.h>
 #include <regex>
 
+#ifdef NDEBUG
+#define _REAL_NDEBUG
+#endif
+
 //Include the ASSERT macro for a release build
 #ifndef NDEBUG
 #define NDEBUG
@@ -31,10 +35,11 @@ TEST(AssertTest_ReleaseBuild, AssertMessage) {
 	  /*EXPECT_THAT(e.what(), MatchesRegex(
 		  R"(Assertion \[2==5\] failed in .*assert_release_test.cpp:27: my message)"
 	  ));*/
-	  EXPECT_TRUE(std::regex_search(e.what(), std::regex(R"(Assertion \[2==5\] failed in .*assert_release_test.cpp:26: my message)")));
+	  EXPECT_TRUE(std::regex_search(e.what(), std::regex(R"(Assertion \[2==5\] failed in .*assert_release_test.cpp:30: my message)")));
   }
 }
 
+#if !(defined(_MSC_VER) && defined(_REAL_NDEBUG))
 TEST(AssertTest_ReleaseBuild, AssertMessageContainsBacktrace) {
   try {
     ASSERT(2==5, "my message");
@@ -45,3 +50,15 @@ TEST(AssertTest_ReleaseBuild, AssertMessageContainsBacktrace) {
     ));
   }
 }
+#else
+TEST(AssertTest_ReleaseBuild, AssertMessageContainsBacktrace) {
+  try {
+    ASSERT(2==5, "my message");
+    FAIL();
+  } catch (const cpputils::AssertFailed &e) {
+    EXPECT_THAT(e.what(), HasSubstr(
+      "#1"
+    ));
+  }
+}
+#endif
diff --git a/test/cpp-utils/assert/backtrace_test.cpp b/test/cpp-utils/assert/backtrace_test.cpp
index deb77c14..769ae8a2 100644
--- a/test/cpp-utils/assert/backtrace_test.cpp
+++ b/test/cpp-utils/assert/backtrace_test.cpp
@@ -19,6 +19,12 @@ namespace {
 	}
 }
 
+TEST(BacktraceTest, ContainsBacktrace) {
+	string backtrace = cpputils::backtrace();
+	EXPECT_THAT(backtrace, HasSubstr("#1"));
+}
+
+#if !(defined(_MSC_VER) && defined(NDEBUG))
 TEST(BacktraceTest, ContainsExecutableName) {
     string backtrace = cpputils::backtrace();
     EXPECT_THAT(backtrace, HasSubstr("cpp-utils-test"));
@@ -29,7 +35,7 @@ TEST(BacktraceTest, ContainsTopLevelLine) {
     EXPECT_THAT(backtrace, HasSubstr("BacktraceTest"));
     EXPECT_THAT(backtrace, HasSubstr("ContainsTopLevelLine"));
 }
-
+#endif
 
 namespace {
 	std::string call_process_exiting_with_nullptr_violation() {
@@ -77,6 +83,7 @@ TEST(BacktraceTest, DoesntCrashOnCaughtException) {
 	}
 }
 
+#if !(defined(_MSC_VER) && defined(NDEBUG))
 TEST(BacktraceTest, ShowBacktraceOnNullptrAccess) {
 	auto output = call_process_exiting_with_nullptr_violation();
 	EXPECT_THAT(output, HasSubstr("cpp-utils-test_exit_signal"));
@@ -96,6 +103,27 @@ TEST(BacktraceTest, ShowBacktraceOnSigIll) {
 	auto output = call_process_exiting_with_sigill();
 	EXPECT_THAT(output, HasSubstr("cpp-utils-test_exit_signal"));
 }
+#else
+TEST(BacktraceTest, ShowBacktraceOnNullptrAccess) {
+	auto output = call_process_exiting_with_nullptr_violation();
+	EXPECT_THAT(output, HasSubstr("#1"));
+}
+
+TEST(BacktraceTest, ShowBacktraceOnSigSegv) {
+	auto output = call_process_exiting_with_sigsegv();
+	EXPECT_THAT(output, HasSubstr("#1"));
+}
+
+TEST(BacktraceTest, ShowBacktraceOnUnhandledException) {
+	auto output = call_process_exiting_with_exception("my_exception_message");
+	EXPECT_THAT(output, HasSubstr("#1"));
+}
+
+TEST(BacktraceTest, ShowBacktraceOnSigIll) {
+	auto output = call_process_exiting_with_sigill();
+	EXPECT_THAT(output, HasSubstr("#1"));
+}
+#endif
 
 #if !defined(_MSC_VER)
 TEST(BacktraceTest, ShowBacktraceOnSigAbrt) {
diff --git a/test/cpp-utils/crypto/symmetric/CipherTest.cpp b/test/cpp-utils/crypto/symmetric/CipherTest.cpp
index ea09ee81..ee8d73c3 100644
--- a/test/cpp-utils/crypto/symmetric/CipherTest.cpp
+++ b/test/cpp-utils/crypto/symmetric/CipherTest.cpp
@@ -1,4 +1,3 @@
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include <gtest/gtest.h>
 #include "cpp-utils/crypto/symmetric/Cipher.h"
 #include "cpp-utils/crypto/symmetric/ciphers.h"
@@ -253,11 +252,9 @@ INSTANTIATE_TYPED_TEST_CASE_P(Cast256_CFB, CipherTest, Cast256_CFB); //CFB mode
 INSTANTIATE_TYPED_TEST_CASE_P(Cast256_GCM, CipherTest, Cast256_GCM);
 INSTANTIATE_TYPED_TEST_CASE_P(Cast256_GCM, AuthenticatedCipherTest, Cast256_GCM);
 
-#if CRYPTOPP_VERSION != 564
 INSTANTIATE_TYPED_TEST_CASE_P(Mars448_CFB, CipherTest, Mars448_CFB); //CFB mode is not authenticated
 INSTANTIATE_TYPED_TEST_CASE_P(Mars448_GCM, CipherTest, Mars448_GCM);
 INSTANTIATE_TYPED_TEST_CASE_P(Mars448_GCM, AuthenticatedCipherTest, Mars448_GCM);
-#endif
 INSTANTIATE_TYPED_TEST_CASE_P(Mars256_CFB, CipherTest, Mars256_CFB); //CFB mode is not authenticated
 INSTANTIATE_TYPED_TEST_CASE_P(Mars256_GCM, CipherTest, Mars256_GCM);
 INSTANTIATE_TYPED_TEST_CASE_P(Mars256_GCM, AuthenticatedCipherTest, Mars256_GCM);
@@ -286,10 +283,9 @@ TEST(CipherNameTest, TestCipherNames) {
   EXPECT_EQ("cast-256-gcm", string(Cast256_GCM::NAME));
   EXPECT_EQ("cast-256-cfb", string(Cast256_CFB::NAME));
 
-#if CRYPTOPP_VERSION != 564
+
   EXPECT_EQ("mars-448-gcm", string(Mars448_GCM::NAME));
   EXPECT_EQ("mars-448-cfb", string(Mars448_CFB::NAME));
-#endif
   EXPECT_EQ("mars-256-gcm", string(Mars256_GCM::NAME));
   EXPECT_EQ("mars-256-cfb", string(Mars256_CFB::NAME));
   EXPECT_EQ("mars-128-gcm", string(Mars128_GCM::NAME));
diff --git a/test/cryfs/config/CompatibilityTest.cpp b/test/cryfs/config/CompatibilityTest.cpp
index 50ee1d9c..2721b089 100644
--- a/test/cryfs/config/CompatibilityTest.cpp
+++ b/test/cryfs/config/CompatibilityTest.cpp
@@ -1,4 +1,3 @@
-#include "cpp-utils/crypto/cryptopp_byte.h"
 #include <gtest/gtest.h>
 #include <vector>
 #include <boost/filesystem.hpp>
diff --git a/test/cryfs/config/CryCipherTest.cpp b/test/cryfs/config/CryCipherTest.cpp
index 2dbd5a76..1fd17a43 100644
--- a/test/cryfs/config/CryCipherTest.cpp
+++ b/test/cryfs/config/CryCipherTest.cpp
@@ -77,10 +77,7 @@ TEST_F(CryCipherTest, FindsCorrectCipher) {
     "aes-256-gcm", "aes-256-cfb", "aes-256-gcm", "aes-256-cfb",
     "twofish-256-gcm", "twofish-256-cfb", "twofish-256-gcm", "twofish-256-cfb",
     "serpent-256-gcm", "serpent-256-cfb", "serpent-256-gcm", "serpent-256-cfb",
-    "cast-256-gcm", "cast-256-cfb",
-#if CRYPTOPP_VERSION != 564
-    "mars-448-gcm", "mars-448-cfb",
-#endif
+    "cast-256-gcm", "cast-256-cfb", "mars-448-gcm", "mars-448-cfb",
     "mars-256-gcm", "mars-256-cfb", "mars-256-gcm", "mars-256-cfb"
   });
 }
@@ -100,10 +97,8 @@ TEST_F(CryCipherTest, CreatesCorrectEncryptedBlockStore) {
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Serpent128_CFB>("serpent-128-cfb");
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Cast256_GCM>("cast-256-gcm");
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Cast256_CFB>("cast-256-cfb");
-#if CRYPTOPP_VERSION != 564
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Mars448_GCM>("mars-448-gcm");
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Mars448_CFB>("mars-448-cfb");
-#endif
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Mars256_GCM>("mars-256-gcm");
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Mars256_CFB>("mars-256-cfb");
     EXPECT_CREATES_CORRECT_ENCRYPTED_BLOCKSTORE<Mars128_GCM>("mars-128-gcm");
@@ -123,11 +118,9 @@ TEST_F(CryCipherTest, ThereIsACipherWithIntegrityWarning) {
     EXPECT_THAT(CryCiphers::find("aes-256-cfb").warning().value(), MatchesRegex(".*integrity.*"));
 }
 
-#if CRYPTOPP_VERSION != 564
 TEST_F(CryCipherTest, EncryptionKeyHasCorrectSize_448) {
     EXPECT_EQ(Mars448_GCM::STRING_KEYSIZE, CryCiphers::find("mars-448-gcm").createKey(Random::PseudoRandom()).size());
 }
-#endif
 
 TEST_F(CryCipherTest, EncryptionKeyHasCorrectSize_256) {
     EXPECT_EQ(AES256_GCM::STRING_KEYSIZE, CryCiphers::find("aes-256-gcm").createKey(Random::PseudoRandom()).size());
diff --git a/test/cryfs/config/CryConfigCreatorTest.cpp b/test/cryfs/config/CryConfigCreatorTest.cpp
index 9adfe3d1..3bd0ffb6 100644
--- a/test/cryfs/config/CryConfigCreatorTest.cpp
+++ b/test/cryfs/config/CryConfigCreatorTest.cpp
@@ -155,7 +155,6 @@ TEST_F(CryConfigCreatorTest, ChoosesEmptyRootBlobId) {
     EXPECT_EQ("", config.RootBlob()); // This tells CryFS to create a new root blob
 }
 
-#if CRYPTOPP_VERSION != 564
 TEST_F(CryConfigCreatorTest, ChoosesValidEncryptionKey_448) {
     AnswerNoToDefaultSettings();
     IGNORE_ASK_FOR_MISSINGBLOCKISINTEGRITYVIOLATION();
@@ -163,7 +162,6 @@ TEST_F(CryConfigCreatorTest, ChoosesValidEncryptionKey_448) {
     CryConfig config = creator.create(none, none, none, false).config;
     cpputils::Mars448_GCM::EncryptionKey::FromString(config.EncryptionKey()); // This crashes if invalid
 }
-#endif
 
 TEST_F(CryConfigCreatorTest, ChoosesValidEncryptionKey_256) {
     AnswerNoToDefaultSettings();