diff --git a/src/Magnum/Audio/Extensions.h b/src/Magnum/Audio/Extensions.h
index 221b8a20a..3f6766a61 100644
--- a/src/Magnum/Audio/Extensions.h
+++ b/src/Magnum/Audio/Extensions.h
@@ -93,6 +93,7 @@ namespace Extensions {
         constexpr static const char* string() { return #prefix "_" #extension "_" #vendor; } \
     };
 
+/* LCOV_EXCL_START */
 /* IMPORTANT: don't forget to add new extensions also in Context.cpp */
 namespace AL {
     namespace EXT {
@@ -116,6 +117,7 @@ namespace AL {
         _extension(9,ALC,SOFT,HRTF) // #???
     }
 }
+/* LCOV_EXCL_STOP */
 #undef _extension
 #undef _extension_rev
 #endif
diff --git a/src/Magnum/GL/Extensions.h b/src/Magnum/GL/Extensions.h
index 81901a921..8df223706 100644
--- a/src/Magnum/GL/Extensions.h
+++ b/src/Magnum/GL/Extensions.h
@@ -88,6 +88,7 @@ namespace Extensions {
         constexpr static const char* string() { return "GL_" #vendor "_" #extension; } \
     };
 
+/* LCOV_EXCL_START */
 #ifndef MAGNUM_TARGET_GLES
 namespace AMD {
     _extension(  0,AMD,transform_feedback3_lines_triangles, GL210, None) // #397
@@ -634,6 +635,7 @@ namespace ANDROID {
     _extension(162,MAGNUM,shader_vertex_id,         GLES300, GLES300)
     #endif
 }
+/* LCOV_EXCL_STOP */
 #endif
 #undef _extension
 #endif
diff --git a/src/Magnum/Vk/Extensions.h b/src/Magnum/Vk/Extensions.h
index 61f1c8e90..480c827d9 100644
--- a/src/Magnum/Vk/Extensions.h
+++ b/src/Magnum/Vk/Extensions.h
@@ -84,6 +84,7 @@ namespace Extensions {
             return "VK_" #vendor "_" #extension ""_s;                       \
         }                                                                   \
     };
+/* LCOV_EXCL_START */
 namespace EXT {
     /** @todo remove EXT_debug_report when all platforms have EXT_debug_utils
         (my Huawei P10 doesn't have it) */
@@ -97,6 +98,7 @@ namespace EXT {
     _extension(13, KHR,external_semaphore_capabilities,     Vk10, Vk11) // #77
     _extension(14, KHR,external_fence_capabilities,         Vk10, Vk11) // #113
 }
+/* LCOV_EXCL_STOP */
 #undef _extension
 
 #define _extension_(index, vendor, name, extension, _requiredVersion, _coreVersion) \
@@ -111,6 +113,7 @@ namespace EXT {
     };
 #define _extension(index, vendor, extension, _requiredVersion, _coreVersion) \
     _extension_(index, vendor, extension, extension, _requiredVersion, _coreVersion)
+/* LCOV_EXCL_START */
 namespace EXT {
     /** @todo remove EXT_debug_marker when all platforms have EXT_debug_utils
         (my Huawei P10 doesn't have it) */
@@ -174,6 +177,7 @@ namespace EXT {
     _extension(71, KHR,ray_tracing_pipeline,                Vk11, None) // #348
     _extension(72, KHR,ray_query,                           Vk11, None) // #349
 }
+/* LCOV_EXCL_STOP */
 #undef _extension
 #undef _extension_