diff --git a/src/Magnum/GL/Context.cpp b/src/Magnum/GL/Context.cpp
index a9ae98e2c..58de84b38 100644
--- a/src/Magnum/GL/Context.cpp
+++ b/src/Magnum/GL/Context.cpp
@@ -1284,11 +1284,14 @@ Context::Configuration& Context::Configuration::addDisabledExtensions(std::initi
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_TARGET_WEBGL
 Debug& operator<<(Debug& debug, const Context::Flag value) {
-    debug << "GL::Context::Flag" << Debug::nospace;
+    const bool packed = debug.immediateFlags() >= Debug::Flag::Packed;
+
+    if(!packed)
+        debug << "GL::Context::Flag" << Debug::nospace;
 
     switch(value) {
         /* LCOV_EXCL_START */
-        #define _c(value) case Context::Flag::value: return debug << "::" #value;
+        #define _c(value) case Context::Flag::value: return debug << (packed ? "" : "::") << Debug::nospace << #value;
         _c(Debug)
         #ifndef MAGNUM_TARGET_GLES
         _c(ForwardCompatible)
@@ -1301,11 +1304,11 @@ Debug& operator<<(Debug& debug, const Context::Flag value) {
         /* LCOV_EXCL_STOP */
     }
 
-    return debug << "(" << Debug::nospace << reinterpret_cast<void*>(GLint(value)) << Debug::nospace << ")";
+    return debug << (packed ? "" : "(") << Debug::nospace << reinterpret_cast<void*>(GLint(value)) << Debug::nospace << (packed ? "" : ")");
 }
 
 Debug& operator<<(Debug& debug, const Context::Flags value) {
-    return Containers::enumSetDebugOutput(debug, value, "GL::Context::Flags{}", {
+    return Containers::enumSetDebugOutput(debug, value, debug.immediateFlags() >= Debug::Flag::Packed ? "{}" : "GL::Context::Flags{}", {
         Context::Flag::Debug,
         #ifndef MAGNUM_TARGET_GLES
         Context::Flag::ForwardCompatible,
@@ -1319,11 +1322,14 @@ Debug& operator<<(Debug& debug, const Context::Flags value) {
 #endif
 
 Debug& operator<<(Debug& debug, const Context::DetectedDriver value) {
-    debug << "GL::Context::DetectedDriver" << Debug::nospace;
+    const bool packed = debug.immediateFlags() >= Debug::Flag::Packed;
+
+    if(!packed)
+        debug << "GL::Context::DetectedDriver" << Debug::nospace;
 
     switch(value) {
         /* LCOV_EXCL_START */
-        #define _c(value) case Context::DetectedDriver::value: return debug << "::" #value;
+        #define _c(value) case Context::DetectedDriver::value: return debug << (packed ? "" : "::") << Debug::nospace << #value;
         _c(Amd)
         #ifdef MAGNUM_TARGET_GLES
         _c(Angle)
@@ -1342,11 +1348,11 @@ Debug& operator<<(Debug& debug, const Context::DetectedDriver value) {
         /* LCOV_EXCL_STOP */
     }
 
-    return debug << "(" << Debug::nospace << reinterpret_cast<void*>(GLint(value)) << Debug::nospace << ")";
+    return debug << (packed ? "" : "(") << Debug::nospace << reinterpret_cast<void*>(GLint(value)) << Debug::nospace << (packed ? "" : ")");
 }
 
 Debug& operator<<(Debug& debug, const Context::DetectedDrivers value) {
-    return Containers::enumSetDebugOutput(debug, value, "GL::Context::DetectedDrivers{}", {
+    return Containers::enumSetDebugOutput(debug, value, debug.immediateFlags() >= Debug::Flag::Packed ? "{}" : "GL::Context::DetectedDrivers{}", {
         #ifndef MAGNUM_TARGET_WEBGL
         Context::DetectedDriver::Amd,
         #endif
diff --git a/src/Magnum/GL/Test/ContextTest.cpp b/src/Magnum/GL/Test/ContextTest.cpp
index eaa2afde1..c9070c4c3 100644
--- a/src/Magnum/GL/Test/ContextTest.cpp
+++ b/src/Magnum/GL/Test/ContextTest.cpp
@@ -56,10 +56,14 @@ struct ContextTest: TestSuite::Tester {
     void extensions();
 
     void debugFlag();
+    void debugFlagPacked();
     void debugFlags();
+    void debugFlagsPacked();
 
     void debugDetectedDriver();
+    void debugDetectedDriverPacked();
     void debugDetectedDrivers();
+    void debugDetectedDriversPacked();
 };
 
 ContextTest::ContextTest() {
@@ -78,10 +82,14 @@ ContextTest::ContextTest() {
               &ContextTest::extensions,
 
               &ContextTest::debugFlag,
+              &ContextTest::debugFlagPacked,
               &ContextTest::debugFlags,
+              &ContextTest::debugFlagsPacked,
 
               &ContextTest::debugDetectedDriver,
-              &ContextTest::debugDetectedDrivers});
+              &ContextTest::debugDetectedDriverPacked,
+              &ContextTest::debugDetectedDrivers,
+              &ContextTest::debugDetectedDriversPacked});
 }
 
 void ContextTest::isExtension() {
@@ -453,13 +461,35 @@ void ContextTest::debugFlag() {
     #endif
 }
 
+void ContextTest::debugFlagPacked() {
+    #ifdef MAGNUM_TARGET_WEBGL
+    CORRADE_SKIP("No context flags on Emscripten yet.");
+    #else
+    std::ostringstream out;
+    /* Last is not packed, ones before should not make any flags persistent */
+    Debug{&out} << Debug::packed << Context::Flag::Debug << Debug::packed << Context::Flag(0xdead) << Context::Flag::NoError;
+    CORRADE_COMPARE(out.str(), "Debug 0xdead GL::Context::Flag::NoError\n");
+    #endif
+}
+
 void ContextTest::debugFlags() {
     #ifdef MAGNUM_TARGET_WEBGL
     CORRADE_SKIP("No context flags on Emscripten yet.");
     #else
     std::ostringstream out;
-    Debug(&out) << Context::Flags{} << (Context::Flag::Debug|Context::Flag::NoError) << (Context::Flag::Debug|Context::Flag(0xded0));
-    CORRADE_COMPARE(out.str(), "GL::Context::Flags{} GL::Context::Flag::Debug|GL::Context::Flag::NoError GL::Context::Flag::Debug|GL::Context::Flag(0xded0)\n");
+    Debug{&out} << (Context::Flag::Debug|Context::Flag::NoError|Context::Flag(0xded0)) << Context::Flags{};
+    CORRADE_COMPARE(out.str(), "GL::Context::Flag::Debug|GL::Context::Flag::NoError|GL::Context::Flag(0xded0) GL::Context::Flags{}\n");
+    #endif
+}
+
+void ContextTest::debugFlagsPacked() {
+    #ifdef MAGNUM_TARGET_WEBGL
+    CORRADE_SKIP("No context flags on Emscripten yet.");
+    #else
+    std::ostringstream out;
+    /* Last is not packed, ones before should not make any flags persistent */
+    Debug{&out} << Debug::packed << (Context::Flag::Debug|Context::Flag::NoError|Context::Flag(0xded0)) << Debug::packed << Context::Flags{} << (Context::Flag::Debug|Context::Flag::NoError);
+    CORRADE_COMPARE(out.str(), "Debug|NoError|0xded0 {} GL::Context::Flag::Debug|GL::Context::Flag::NoError\n");
     #endif
 }
 
@@ -474,14 +504,38 @@ void ContextTest::debugDetectedDriver() {
     #endif
 }
 
+void ContextTest::debugDetectedDriverPacked() {
+    std::ostringstream out;
+    /* Last is not packed, ones before should not make any flags persistent */
+    #ifndef MAGNUM_TARGET_WEBGL
+    Debug{&out} << Debug::packed << Context::DetectedDriver::Amd << Debug::packed << Context::DetectedDriver(0xdead) << Context::DetectedDriver::NVidia;
+    CORRADE_COMPARE(out.str(), "Amd 0xdead GL::Context::DetectedDriver::NVidia\n");
+    #else
+    Debug{&out} << Debug::packed << Context::DetectedDriver::Angle << Debug::packed << Context::DetectedDriver(0xdead) << Context::DetectedDriver::Angle;
+    CORRADE_COMPARE(out.str(), "Angle 0xdead GL::Context::DetectedDriver::Angle\n");
+    #endif
+}
+
 void ContextTest::debugDetectedDrivers() {
     std::ostringstream out;
     #ifndef MAGNUM_TARGET_WEBGL
-    Debug{&out} << Context::DetectedDrivers{} << (Context::DetectedDriver::Amd|Context::DetectedDriver::NVidia) << (Context::DetectedDriver::Mesa|Context::DetectedDriver(0xde00));
-    CORRADE_COMPARE(out.str(), "GL::Context::DetectedDrivers{} GL::Context::DetectedDriver::Amd|GL::Context::DetectedDriver::NVidia GL::Context::DetectedDriver::Mesa|GL::Context::DetectedDriver(0xde00)\n");
+    Debug{&out} << (Context::DetectedDriver::Amd|Context::DetectedDriver::Mesa|Context::DetectedDriver(0xde00)) << Context::DetectedDrivers{};
+    CORRADE_COMPARE(out.str(), "GL::Context::DetectedDriver::Amd|GL::Context::DetectedDriver::Mesa|GL::Context::DetectedDriver(0xde00) GL::Context::DetectedDrivers{}\n");
+    #else
+    Debug{&out} << (Context::DetectedDriver::Angle|Context::DetectedDriver(0xde00)) << Context::DetectedDrivers{};
+    CORRADE_COMPARE(out.str(), "GL::Context::DetectedDriver::Angle|GL::Context::DetectedDriver(0xde00) GL::Context::DetectedDrivers{}\n");
+    #endif
+}
+
+void ContextTest::debugDetectedDriversPacked() {
+    std::ostringstream out;
+    /* Last is not packed, ones before should not make any flags persistent */
+    #ifndef MAGNUM_TARGET_WEBGL
+    Debug{&out} << Debug::packed << (Context::DetectedDriver::Amd|Context::DetectedDriver::Mesa|Context::DetectedDriver(0xde00)) << Debug::packed << Context::DetectedDrivers{} << (Context::DetectedDriver::Amd|Context::DetectedDriver::Mesa);
+    CORRADE_COMPARE(out.str(), "Amd|Mesa|0xde00 {} GL::Context::DetectedDriver::Amd|GL::Context::DetectedDriver::Mesa\n");
     #else
-    Debug{&out} << Context::DetectedDrivers{} << (Context::DetectedDriver::Angle) << (Context::DetectedDriver::Angle|Context::DetectedDriver(0xde00));
-    CORRADE_COMPARE(out.str(), "GL::Context::DetectedDrivers{} GL::Context::DetectedDriver::Angle GL::Context::DetectedDriver::Angle|GL::Context::DetectedDriver(0xde00)\n");
+    Debug{&out} << Debug::packed << (Context::DetectedDriver::Angle|Context::DetectedDriver(0xde00)) << Debug::packed << Context::DetectedDrivers{} << (Context::DetectedDriver::Angle|Context::DetectedDriver(0xde00));
+    CORRADE_COMPARE(out.str(), "Angle|0xde00 {} GL::Context::DetectedDriver::Angle|GL::Context::DetectedDriver(0xde00)\n");
     #endif
 }