diff --git a/src/keys/drivers/YubiKey.cpp b/src/keys/drivers/YubiKey.cpp
index a490f0699..ffb48fc74 100644
--- a/src/keys/drivers/YubiKey.cpp
+++ b/src/keys/drivers/YubiKey.cpp
@@ -192,10 +192,6 @@ YubiKey::ChallengeResult YubiKey::challenge(int slot, bool mayBlock, const QByte
     c = reinterpret_cast<const unsigned char*>(paddedChallenge.constData());
     r = reinterpret_cast<unsigned char*>(response.data());
 
-#ifdef QT_DEBUG
-    qDebug().nospace() << __func__ << "(" << slot << ") c = " << printByteArray(paddedChallenge);
-#endif
-
     int ret = yk_challenge_response(m_yk, yk_cmd, mayBlock, paddedChallenge.size(), c, response.size(), r);
     emit challenged();
 
@@ -227,9 +223,5 @@ YubiKey::ChallengeResult YubiKey::challenge(int slot, bool mayBlock, const QByte
     // actual HMAC-SHA1 response is only 20 bytes
     response.resize(20);
 
-#ifdef QT_DEBUG
-    qDebug().nospace() << __func__ << "(" << slot << ") r = " << printByteArray(response) << ", ret = " << ret;
-#endif
-
     return SUCCESS;
 }
diff --git a/tests/TestYkChallengeResponseKey.cpp b/tests/TestYkChallengeResponseKey.cpp
index bd58ac018..046c06660 100644
--- a/tests/TestYkChallengeResponseKey.cpp
+++ b/tests/TestYkChallengeResponseKey.cpp
@@ -46,7 +46,7 @@ void TestYubiKeyChalResp::init()
         QSKIP("Unable to connect to YubiKey", SkipAll);
     }
 
-    /* Crypto subsystem needs to be initalized for YubiKey testing */
+    // crypto subsystem needs to be initialized for YubiKey testing
     QVERIFY(Crypto::init());
 }
 
@@ -57,7 +57,7 @@ void TestYubiKeyChalResp::detectDevices()
                                  Qt::QueuedConnection);
     QtConcurrent::run(YubiKey::instance(), &YubiKey::detect);
 
-    /* Need to wait for the hardware (that's hopefully plugged in)... */
+    // need to wait for the hardware (that's hopefully plugged in)...
     QTest::qWait(2000);
     QVERIFY2(m_detected > 0, "Is a YubiKey attached?");
 }