diff --git a/.codecov.yml b/.codecov.yml
index 9ec352888..e10eb4a78 100644
--- a/.codecov.yml
+++ b/.codecov.yml
@@ -1,4 +1,5 @@
 comment: false
+
 coverage:
   status:
     project:
@@ -9,6 +10,9 @@ coverage:
       default:
         target: 0%     # the (on purpose low) required coverage value
 
+ignore:
+  - 'R/inline.R'	# function factory setup confuses codecov
+
 #  layout: "header, diff, tree, changes"
 #  behavior: default
 #  require_changes: false  # if true: only post the comment if coverage changes
diff --git a/ChangeLog b/ChangeLog
index 062dc6860..e4f6e5458 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,28 @@
+2026-01-01  Dirk Eddelbuettel  <edd@debian.org>
+
+	* R/Attributes.R: Additional or adjusted #nocov tags
+	* R/Rcpp.package.skeleton.R: Idem
+	* R/RcppLdpath.R: Idem
+	* R/asis.R: Idem
+	* R/inline.R: Idem
+	* inst/include/Rcpp/api/meat/Rcpp_eval.h: Idem
+	* inst/include/Rcpp/internal/caster.h: Idem
+	* inst/include/Rcpp/internal/export.h: Idem
+	* inst/include/Rcpp/proxy/NamesProxy.h: Idem
+	* inst/include/Rcpp/proxy/SlotProxy.h: Idem
+	* inst/include/Rcpp/vector/Vector.h: Idem
+	* inst/include/Rcpp/vector/proxy.h: Idem
+	* inst/include/Rcpp/vector/traits.h: Idem
+	* inst/include/Rcpp/Environment.h: Idem
+	* inst/include/Rcpp/Function.h: Idem
+	* inst/include/Rcpp/Module.h: Idem
+	* inst/include/Rcpp/S4.h: Idem
+	* inst/include/Rcpp/as.h: Idem
+	* inst/include/Rcpp/exceptions.h: Idem
+	* inst/include/Rcpp/r_cast.h: Idem
+	* src/attributes.cpp: Idem
+	* src/barrier.cpp: Idem
+
 2025-12-30  Dirk Eddelbuettel  <edd@debian.org>
 
 	* tests/tinytest.R: Refine decision of when not to run all tests even
diff --git a/R/Attributes.R b/R/Attributes.R
index 1e84ab932..f34e83b17 100644
--- a/R/Attributes.R
+++ b/R/Attributes.R
@@ -1,6 +1,6 @@
 
 # Copyright (C) 2012 - 2022  JJ Allaire, Dirk Eddelbuettel and Romain Francois
-# Copyright (C) 2023 - 2024  JJ Allaire, Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
+# Copyright (C) 2023 - 2026  JJ Allaire, Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
 #
 # This file is part of Rcpp.
 #
@@ -571,7 +571,7 @@ compileAttributes <- function(pkgdir = ".", verbose = getOption("verbose")) {
 }
 
 .openmpPluginDefault <- function() {
-    list(env = list(PKG_CXXFLAGS = "-fopenmp", PKG_LIBS = "-fopenmp"))
+    list(env = list(PKG_CXXFLAGS = "-fopenmp", PKG_LIBS = "-fopenmp"))			# #nocov start
 }
 
 .openmpPluginDarwin <- function() {
@@ -629,7 +629,7 @@ compileAttributes <- function(pkgdir = ".", verbose = getOption("verbose")) {
         libs <- "-fopenmp"
     }
 
-    list(env = list(PKG_CXXFLAGS = cxxflags, PKG_LIBS = libs))
+    list(env = list(PKG_CXXFLAGS = cxxflags, PKG_LIBS = libs))				# #nocov end
 
 }
 
diff --git a/R/Module.R b/R/Module.R
index e0268012f..10c3cadce 100644
--- a/R/Module.R
+++ b/R/Module.R
@@ -1,4 +1,4 @@
-# Copyright (C) 2010 - 2021  John Chambers, Dirk Eddelbuettel and Romain Francois
+# Copyright (C) 2010 - 2026  John Chambers, Dirk Eddelbuettel and Romain Francois
 #
 # This file is part of Rcpp.
 #
diff --git a/R/Rcpp.package.skeleton.R b/R/Rcpp.package.skeleton.R
index 218761d2a..d8c989b50 100644
--- a/R/Rcpp.package.skeleton.R
+++ b/R/Rcpp.package.skeleton.R
@@ -1,4 +1,4 @@
-# Copyright (C) 2009 - 2025  Dirk Eddelbuettel and Romain Francois
+# Copyright (C) 2009 - 2026  Dirk Eddelbuettel and Romain Francois
 #
 # This file is part of Rcpp.
 #
@@ -93,7 +93,7 @@ Rcpp.package.skeleton <- function(name = "anRpackage", list = character(),
                                          email))
         fields_written <- c("Package", "Type", "Title", "Version", "Date",
                             "Authors@R", "Description", "License", "Imports", "LinkingTo")
-        if (!is.na(githubuser)) {
+        if (!is.na(githubuser)) {					# #nocov start
             x <- cbind(x, matrix("", 1, 1, dimnames=list("", "URL")))
             x[1, "URL"] <- paste0("https://github.com/", githubuser, "/", name)
             x <- cbind(x, matrix("", 1, 1, dimnames=list("", "BugReports")))
@@ -102,7 +102,7 @@ Rcpp.package.skeleton <- function(name = "anRpackage", list = character(),
             fields_written <- c("Package", "Type", "Title", "Version", "Date",
                                 "Authors@R", "Description", "URL", "BugReports",
                                 "License", "Imports", "LinkingTo")
-            }
+            }										# #nocov end
 
         x[, "License"] <- license
         x[, "Title"] <- "Concise Summary of What the Package Does"
@@ -136,7 +136,7 @@ Rcpp.package.skeleton <- function(name = "anRpackage", list = character(),
 
     ## update the package description help page
     if (havePkgKitten) {                # if pkgKitten is available, use it
-        pkgKitten::playWithPerPackageHelpPage(name, path, maintainer, email)
+        pkgKitten::playWithPerPackageHelpPage(name, path, maintainer, email) # #nocov
     } else {
         .playWithPerPackageHelpPage(name, path, maintainer, email)			# #nocov
     }
diff --git a/R/RcppLdpath.R b/R/RcppLdpath.R
index 73fa4a9af..d8acb323e 100644
--- a/R/RcppLdpath.R
+++ b/R/RcppLdpath.R
@@ -1,4 +1,4 @@
-# Copyright (C) 2010 - 2021  Dirk Eddelbuettel and Romain Francois
+# Copyright (C) 2010 - 2026  Dirk Eddelbuettel and Romain Francois
 #
 # This file is part of Rcpp.
 #
@@ -25,7 +25,7 @@ Rcpp.quoteNonStandard <- function(path) {
     ## On unix, check if path has only characters that do not need quoting
     noquote <- .Platform$OS.type == "unix" && grepl("^[[:alnum:]/._~+@%-]*$", path)
     ## If no quoting needed return unchanged else quote input
-    if (noquote) path else shQuote(path)
+    if (noquote) path else shQuote(path)  # #nocov
 }
 
 ## Use R's internal knowledge of path settings to find the lib/ directory
@@ -66,11 +66,11 @@ RcppCxxFlags <- function(cxx0x=FALSE) {
 
 ## Shorter names, and call cat() directly
 ## CxxFlags defaults to no using c++0x extensions are these are considered non-portable
-CxxFlags <- function(cxx0x=FALSE) {
+CxxFlags <- function(cxx0x=FALSE) {				# #nocov start
     #.Deprecated(msg=paste("This function is now deprecated as R uses minimally",
     #                      "viable compilers om all platforme."))
     message("'CxxFlags' has not been needed since 2013 (!!) and may get removed in 2027. Please update your 'Makevars'.")
-    cat(RcppCxxFlags(cxx0x=cxx0x))				# #nocov
+    cat(RcppCxxFlags(cxx0x=cxx0x))				# #nocov end
 }
 
 ## LdFlags defaults to static linking on the non-Linux platforms Windows and OS X
@@ -84,11 +84,11 @@ RcppCapabilities <- capabilities <- function() .Call( rcpp_capabilities )
 
 # compile, load and call the cxx0x.c script to identify whether
 # the compiler is GCC >= 4.3
-RcppCxx0xFlags <- function() {
+RcppCxx0xFlags <- function() {								# #nocov start
     #.Deprecated(msg=paste("This function is now deprecated as R uses minimally",
     #                      "viable compilers om all platforme."))
     message("'RcppCxx0xFlags' has not been needed since 2013 (!!) and may get removed in 2027. Please update your 'Makevars'.")
-    script <- Rcpp.system.file( "discovery", "cxx0x.R" )	# #nocov start
+    script <- Rcpp.system.file( "discovery", "cxx0x.R" )
     flag <- capture.output( source( script ) )
     flag
 }
diff --git a/R/asis.R b/R/asis.R
index ab58d12c8..5fede4fc5 100644
--- a/R/asis.R
+++ b/R/asis.R
@@ -30,7 +30,7 @@
 ##' #   %\VignettePackage{Rcpp}
 ##' #   %\VignetteEncoding{UTF-8}
 ##' #   %\VignetteEngine{Rcpp::asis}
-asisWeave <- function (file, ...) {
+asisWeave <- function (file, ...) {								# #nocov start
     output <- tools::file_path_sans_ext(basename(file))
     if (!file.exists(output)) {
         outputS <- file.path("..", "inst", "doc", output)
@@ -53,4 +53,4 @@ asisTangle <- function (file, ..., pattern = "(|[.][^.]*)[.]asis$") {
     filenameR <- sprintf("%s.R", fullname)
     cat(sprintf("### This is an R script tangled from '%s'\n", filename), file = filenameR)
     invisible(filenameR)
-}
+}																# #nocov end
diff --git a/R/inline.R b/R/inline.R
index 8243e033f..165c615ed 100644
--- a/R/inline.R
+++ b/R/inline.R
@@ -1,4 +1,4 @@
-# Copyright (C) 2009 - 2017  Dirk Eddelbuettel and Romain Francois
+# Copyright (C) 2009 - 2026  Dirk Eddelbuettel and Romain Francois
 #
 # This file is part of Rcpp.
 #
@@ -38,12 +38,11 @@ Rcpp.plugin.maker <- function(include.before = "",
 #endif
 
 using namespace Rcpp;", include.before, include.after)
-
         out <- list(env = list( PKG_LIBS = libs ),
                     includes = includes,
                     LinkingTo = LinkingTo ,
                     body = function( x ) {
-                        sprintf( "BEGIN_RCPP\n%s\nEND_RCPP", x )
+                        sprintf( "BEGIN_RCPP\n%s\nEND_RCPP", x )  # #nocov
                     },
                     Depends = Depends,
                     Imports = Imports)
@@ -54,4 +53,3 @@ using namespace Rcpp;", include.before, include.after)
 }
 
 inlineCxxPlugin <- Rcpp.plugin.maker()
-
diff --git a/R/loadModule.R b/R/loadModule.R
index 77ac55139..82d2dcda1 100644
--- a/R/loadModule.R
+++ b/R/loadModule.R
@@ -1,4 +1,4 @@
-# Copyright (C) 2010 - 2015  John Chambers, Dirk Eddelbuettel and Romain Francois
+# Copyright (C) 2010 - 2026  John Chambers, Dirk Eddelbuettel and Romain Francois
 #
 # This file is part of Rcpp.
 #
@@ -54,12 +54,12 @@ loadModule <- function( module, what = character(), loadNow,
         if(exists(metaName, envir = env, inherits = FALSE))
             loadM <- get(metaName, envir = env)
     }
-    else if(is(module, "Module")) {	
-        loadM <- as.environment(module)		# #nocov
-        module <- get(loadM, "moduleName")      # #nocov
+    else if(is(module, "Module")) {			# #nocov start
+        loadM <- as.environment(module)
+        module <- get(loadM, "moduleName")
     }
     else
-        stop(gettextf("Argument \"module\" should be a module or the name of a module: got an object of class \"%s\"", class(module)))
+        stop(gettextf("Argument \"module\" should be a module or the name of a module: got an object of class \"%s\"", class(module)))  # #nocov end
     if(missing(loadNow)) { # test it
         if(is.null(loadM))
             loadM <- tryCatch(Module( module, mustStart = TRUE, where = env ),
@@ -104,7 +104,7 @@ loadModule <- function( module, what = character(), loadNow,
         assignAs <- .moduleNames(what)
         for( i in seq_along(what) ) {
             if(.botched)
-                assign(assignAs[[i]], NULL, envir = storage)
+                assign(assignAs[[i]], NULL, envir = storage)    # #nocov
             else
                 assign(assignAs[[i]], get(what[[i]], envir = storage), envir = env)
         }
@@ -120,4 +120,3 @@ loadModule <- function( module, what = character(), loadNow,
         invisible(myCall)					# #nocov
     }
 }
-
diff --git a/inst/include/Rcpp/Environment.h b/inst/include/Rcpp/Environment.h
index 4072755f7..bc89a702f 100644
--- a/inst/include/Rcpp/Environment.h
+++ b/inst/include/Rcpp/Environment.h
@@ -106,7 +106,7 @@ namespace Rcpp{
 
             /* We need to evaluate if it is a promise */
             if( TYPEOF(res) == PROMSXP){
-                res = internal::Rcpp_eval_impl( res, env ) ;
+                res = internal::Rcpp_eval_impl( res, env ) ;  // #nocov
             }
             return res ;
         }
diff --git a/inst/include/Rcpp/Function.h b/inst/include/Rcpp/Function.h
index 3c1e21e99..783318b39 100644
--- a/inst/include/Rcpp/Function.h
+++ b/inst/include/Rcpp/Function.h
@@ -1,7 +1,7 @@
 
 // Function.h: Rcpp R/C++ interface class library -- functions (also primitives and builtins)
 //
-// Copyright (C) 2010 - 2025  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -42,12 +42,12 @@ namespace Rcpp{
             case BUILTINSXP:
                 Storage::set__(x);
                 break;
-            default:
+            default:						// #nocov start
                 const char* fmt = "Cannot convert object to a function: "
                                   "[type=%s; target=CLOSXP, SPECIALSXP, or "
                                   "BUILTINSXP].";
                 throw not_compatible(fmt, Rf_type2char(TYPEOF(x)));
-            }
+            }								// #nocov end
         }
 
         /**
diff --git a/inst/include/Rcpp/Module.h b/inst/include/Rcpp/Module.h
index e14d073ad..7556e9f3c 100644
--- a/inst/include/Rcpp/Module.h
+++ b/inst/include/Rcpp/Module.h
@@ -1,7 +1,7 @@
 
 // Module.h: Rcpp R/C++ interface class library -- Rcpp modules
 //
-// Copyright (C) 2010 - 2025 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026 Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -571,7 +571,7 @@ namespace Rcpp {
     public:
         typedef XPtr<class_Base> XP_Class ;
         typedef Rcpp::XPtr<Rcpp::Module> XP ;
-        CppClass( SEXP x) : S4(x){};
+        CppClass( SEXP x) : S4(x){};			// #nocov
 
         CppClass( Module* p, class_Base* cl, std::string& buffer ) : S4("C++Class") {
 	        XP_Class clxp( cl, false, R_NilValue, R_NilValue ) ;
diff --git a/inst/include/Rcpp/S4.h b/inst/include/Rcpp/S4.h
index d5fa8746a..2ec8cdebf 100644
--- a/inst/include/Rcpp/S4.h
+++ b/inst/include/Rcpp/S4.h
@@ -1,8 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
-//
+
 // S4.h: Rcpp R/C++ interface class library -- S4 objects
 //
-// Copyright (C) 2010 - 2013 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026 Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -38,10 +37,10 @@ namespace Rcpp{
          *
          * @param x must be an S4 object
          */
-        S4_Impl(SEXP x) {
+        S4_Impl(SEXP x) {				// #nocov start
             if( ! ::Rf_isS4(x) ) throw not_s4() ;
             Storage::set__(x) ;
-        }
+        }								// #nocov end
 
         S4_Impl& operator=( SEXP other ){
             Storage::set__( other ) ;
@@ -57,7 +56,7 @@ namespace Rcpp{
         S4_Impl( const std::string& klass ){
             Shield<SEXP> x( R_do_new_object(R_do_MAKE_CLASS(klass.c_str())) );
             if (!Rf_inherits(x, klass.c_str()))
-                throw S4_creation_error( klass ) ;
+                throw S4_creation_error( klass ) ; // #nocov
             Storage::set__(x) ;
         }
 
diff --git a/inst/include/Rcpp/api/meat/Rcpp_eval.h b/inst/include/Rcpp/api/meat/Rcpp_eval.h
index 8eb08e0f0..177668694 100644
--- a/inst/include/Rcpp/api/meat/Rcpp_eval.h
+++ b/inst/include/Rcpp/api/meat/Rcpp_eval.h
@@ -38,8 +38,8 @@ inline SEXP Rcpp_protected_eval(void* eval_data) {
 }
 
 // This is used internally instead of Rf_eval() to make evaluation safer
-inline SEXP Rcpp_eval_impl(SEXP expr, SEXP env) {
-    return Rcpp_fast_eval(expr, env);
+inline SEXP Rcpp_eval_impl(SEXP expr, SEXP env) { // #nocov
+    return Rcpp_fast_eval(expr, env);  // #nocov
 }
 
 #else // R < 3.5.0
diff --git a/inst/include/Rcpp/as.h b/inst/include/Rcpp/as.h
index 466761efb..e6990312c 100644
--- a/inst/include/Rcpp/as.h
+++ b/inst/include/Rcpp/as.h
@@ -1,8 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
-//
+
 // as.h: Rcpp R/C++ interface class library -- convert SEXP to C++ objects
 //
-// Copyright (C) 2009 - 2015  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2009 - 2026  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -30,8 +29,8 @@ namespace Rcpp {
 
         template <typename T> T primitive_as(SEXP x) {
             if (::Rf_length(x) != 1) {
-                const char* fmt = "Expecting a single value: [extent=%i].";
-                throw ::Rcpp::not_compatible(fmt, ::Rf_length(x));
+                const char* fmt = "Expecting a single value: [extent=%i]."; // #nocov
+                throw ::Rcpp::not_compatible(fmt, ::Rf_length(x));			// #nocov
             }
             const int RTYPE = ::Rcpp::traits::r_sexptype_traits<T>::rtype;
             Shield<SEXP> y(r_cast<RTYPE>(x));
@@ -45,14 +44,14 @@ namespace Rcpp {
         }
 
         inline const char* check_single_string(SEXP x) {
-            if (TYPEOF(x) == CHARSXP) return CHAR(x);
+            if (TYPEOF(x) == CHARSXP) return CHAR(x);						// #nocov start
             if (! ::Rf_isString(x) || Rf_length(x) != 1) {
                 const char* fmt = "Expecting a single string value: "
                                   "[type=%s; extent=%i].";
                 throw ::Rcpp::not_compatible(fmt,
                                              Rf_type2char(TYPEOF(x)),
                                              Rf_length(x));
-            }
+            }																// #nocov end
 
             return CHAR(STRING_ELT(::Rcpp::r_cast<STRSXP>(x), 0));
         }
diff --git a/inst/include/Rcpp/exceptions.h b/inst/include/Rcpp/exceptions.h
index 17dd28d01..2311442e3 100644
--- a/inst/include/Rcpp/exceptions.h
+++ b/inst/include/Rcpp/exceptions.h
@@ -3,7 +3,7 @@
 //
 // Copyright (C) 2010 - 2020  Dirk Eddelbuettel and Romain Francois
 // Copyright (C) 2021 - 2024  Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
-// Copyright (C) 2025         Dirk Eddelbuettel, Romain Francois, Iñaki Ucar and James J Balamuta
+// Copyright (C) 2025 - 2026  Dirk Eddelbuettel, Romain Francois, Iñaki Ucar and James J Balamuta
 //
 // This file is part of Rcpp.
 //
@@ -153,7 +153,7 @@ inline void resumeJump(SEXP token) {
     ::R_ReleaseObject(token);
     ::R_ContinueUnwind(token);
     Rf_error("Internal error: Rcpp longjump failed to resume");
-}                                                           // #nocov end
+}
 
 }} // namespace Rcpp::internal
 
@@ -187,7 +187,7 @@ struct LongjumpException {
     template <typename... Args>
     inline void warning(const char* fmt, Args&&... args ) {
         Rf_warning("%s", tfm::format(fmt, std::forward<Args>(args)... ).c_str());
-    }
+    }                                                           // #nocov end
 
     template <typename... Args>
     inline void NORET stop(const char* fmt, Args&&... args) {
diff --git a/inst/include/Rcpp/internal/caster.h b/inst/include/Rcpp/internal/caster.h
index afd63ed39..771e9f1d8 100644
--- a/inst/include/Rcpp/internal/caster.h
+++ b/inst/include/Rcpp/internal/caster.h
@@ -1,9 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
-/* :tabSize=4:indentSize=4:noTabs=false:folding=explicit:collapseFolds=1: */
-//
+
 // caster.h: Rcpp R/C++ interface class library --
 //
-// Copyright (C) 2010 - 2013 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026 Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -26,9 +24,9 @@
 namespace Rcpp{
 namespace internal{
 
-template <typename FROM, typename TO> TO caster(FROM from){
+template <typename FROM, typename TO> TO caster(FROM from){ // #nocov start
 	return static_cast<TO>(from) ;
-}
+} 														    // #nocov end
 
 template <typename T>
 inline Rcomplex Rcomplex_caster( std::complex<T> from ){
@@ -67,4 +65,3 @@ inline std::complex<float>  caster<Rcomplex,std::complex<float> >( Rcomplex from
 }
 
 #endif
-
diff --git a/inst/include/Rcpp/internal/export.h b/inst/include/Rcpp/internal/export.h
index 46ce154c3..04d899433 100644
--- a/inst/include/Rcpp/internal/export.h
+++ b/inst/include/Rcpp/internal/export.h
@@ -77,11 +77,11 @@ namespace Rcpp{
 
 		template <typename InputIterator, typename value_type>
 		void export_range__dispatch( SEXP x, InputIterator first, ::Rcpp::traits::r_type_string_tag ) {
-			if( ! ::Rf_isString( x) ) {
+			if( ! ::Rf_isString( x) ) {					// #nocov start
 			    const char* fmt = "Expecting a string vector: "
 			                      "[type=%s; required=STRSXP].";
 			    throw ::Rcpp::not_compatible(fmt, Rf_type2char(TYPEOF(x)) );
-			}
+			}											// #nocov end
 
 			R_xlen_t n = ::Rf_xlength(x) ;
 			for( R_xlen_t i=0; i<n; i++, ++first ){
diff --git a/inst/include/Rcpp/proxy/NamesProxy.h b/inst/include/Rcpp/proxy/NamesProxy.h
index 694dda9b3..b87b4b0bb 100644
--- a/inst/include/Rcpp/proxy/NamesProxy.h
+++ b/inst/include/Rcpp/proxy/NamesProxy.h
@@ -50,14 +50,14 @@ class NamesProxyPolicy{
             Shield<SEXP> safe_x(x);
 
             /* check if we can use a fast version */
-            if( TYPEOF(x) == STRSXP && parent.size() == Rf_length(x) ){
+            if( TYPEOF(x) == STRSXP && parent.size() == Rf_length(x) ){		// #nocov start
                 Rf_namesgets(parent, x);
             } else {
                 /* use the slower and more flexible version (callback to R) */
                 SEXP namesSym = Rf_install( "names<-" );
                 Shield<SEXP> call(Rf_lang3(namesSym, parent, x));
                 Shield<SEXP> new_vec(Rcpp_fast_eval(call, R_GlobalEnv));
-                parent.set__(new_vec);
+                parent.set__(new_vec);										// #nocov end
             }
 
         }
diff --git a/inst/include/Rcpp/proxy/SlotProxy.h b/inst/include/Rcpp/proxy/SlotProxy.h
index 718a83054..c6d3f4f76 100644
--- a/inst/include/Rcpp/proxy/SlotProxy.h
+++ b/inst/include/Rcpp/proxy/SlotProxy.h
@@ -28,7 +28,7 @@ class SlotProxyPolicy {
     public:
         SlotProxy( CLASS& v, const std::string& name) : parent(v), slot_name(Rf_install(name.c_str())) {
             if( !R_has_slot( v, slot_name) ){
-                throw no_such_slot(name);
+                throw no_such_slot(name);		// #nocov
             }
         }
 
diff --git a/inst/include/Rcpp/r_cast.h b/inst/include/Rcpp/r_cast.h
index 7983f6284..7f26d8966 100644
--- a/inst/include/Rcpp/r_cast.h
+++ b/inst/include/Rcpp/r_cast.h
@@ -1,8 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
-//
+
 // rcast.h: Rcpp R/C++ interface class library -- cast from one SEXP type to another
 //
-// Copyright (C) 2010 - 2017  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -156,7 +155,7 @@ namespace Rcpp {
 
     } // namespace internal
 
-    template <int TARGET> SEXP r_cast(SEXP x) {
+    template <int TARGET> SEXP r_cast(SEXP x) {				// #nocov start
         if (TYPEOF(x) == TARGET) {
             return x;
         } else {
@@ -168,7 +167,7 @@ namespace Rcpp {
             );
             return result;
             #else
-            return internal::r_true_cast<TARGET>(x);		// #nocov
+            return internal::r_true_cast<TARGET>(x);		// #nocov end
             #endif
         }
     }
diff --git a/inst/include/Rcpp/vector/Vector.h b/inst/include/Rcpp/vector/Vector.h
index e5440a5f1..76bc56020 100644
--- a/inst/include/Rcpp/vector/Vector.h
+++ b/inst/include/Rcpp/vector/Vector.h
@@ -1,6 +1,6 @@
 // Vector.h: Rcpp R/C++ interface class library -- vectors
 //
-// Copyright (C) 2010 - 2025  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -345,10 +345,10 @@ class Vector :
         return cache.ref( offset(i) ) ;
     }
 
-    inline Proxy at( const size_t& i) {
+    inline Proxy at( const size_t& i) {												// #nocov start
        return cache.ref( offset(i) ) ;
     }
-    inline const_Proxy at( const size_t& i) const {									// #nocov start
+    inline const_Proxy at( const size_t& i) const {
        return cache.ref( offset(i) ) ;
     }																				// #nocov end
 
diff --git a/inst/include/Rcpp/vector/proxy.h b/inst/include/Rcpp/vector/proxy.h
index 015b77756..296b93001 100644
--- a/inst/include/Rcpp/vector/proxy.h
+++ b/inst/include/Rcpp/vector/proxy.h
@@ -1,8 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
-//
+
 // proxy.h: Rcpp R/C++ interface class library -- proxies
 //
-// Copyright (C) 2010 - 2018  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -182,7 +181,7 @@ namespace internal{
 			R_xlen_t index = 0 ;
 			try{
 				index = parent.offset(name) ;
-				parent[ index ] = rhs ;
+				parent[ index ] = rhs ;  // #nocov
 			} catch( const index_out_of_bounds& ex ){
 				parent.push_back( rhs, name );
 			}
diff --git a/inst/include/Rcpp/vector/traits.h b/inst/include/Rcpp/vector/traits.h
index c6d76d694..3e1dcecec 100644
--- a/inst/include/Rcpp/vector/traits.h
+++ b/inst/include/Rcpp/vector/traits.h
@@ -1,8 +1,7 @@
-// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
-//
+
 // traits.h: Rcpp R/C++ interface class library -- support traits for vector
 //
-// Copyright (C) 2010 - 2018 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2010 - 2026 Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -56,7 +55,7 @@ namespace traits{
 		void check_index(R_xlen_t i) const {
 #ifndef RCPP_NO_BOUNDS_CHECK
 			if (i >= size) {
-				warning("subscript out of bounds (index %s >= vector size %s)", i, size);
+				warning("subscript out of bounds (index %s >= vector size %s)", i, size); // #nocov
 			}
 #endif
 		}
@@ -94,7 +93,7 @@ namespace traits{
 		void check_index(R_xlen_t i) const {
 #ifndef RCPP_NO_BOUNDS_CHECK
 			if (i >= p->size()) {
-				warning("subscript out of bounds (index %s >= vector size %s)", i, p->size());
+				warning("subscript out of bounds (index %s >= vector size %s)", i, p->size()); // #nocov
 			}
 #endif
 		}
diff --git a/src/attributes.cpp b/src/attributes.cpp
index 5240e3627..641b13624 100644
--- a/src/attributes.cpp
+++ b/src/attributes.cpp
@@ -1,7 +1,7 @@
 // attributes.cpp: Rcpp R/C++ interface class library -- Rcpp attributes
 //
 // Copyright (C) 2012 - 2020  JJ Allaire, Dirk Eddelbuettel and Romain Francois
-// Copyright (C) 2021 - 2025  JJ Allaire, Dirk Eddelbuettel, Romain Francois, Iñaki Ucar and Travers Ching
+// Copyright (C) 2021 - 2026  JJ Allaire, Dirk Eddelbuettel, Romain Francois, Iñaki Ucar and Travers Ching
 //
 // This file is part of Rcpp.
 //
@@ -2485,8 +2485,8 @@ namespace attributes {
                 if(attribute.hasParameter(kExportSignature)) {
                     args = attribute.customRSignature();
                     if(!checkRSignature(function, args)) {
-                        std::string rsig_err_msg = "Missing args in " + args;
-                        throw Rcpp::exception(rsig_err_msg.c_str());
+                        std::string rsig_err_msg = "Missing args in " + args; // #nocov
+                        throw Rcpp::exception(rsig_err_msg.c_str());          // #nocov
                     }
                 }
                 // determine the function name
diff --git a/src/barrier.cpp b/src/barrier.cpp
index 019a246ab..aa0febb68 100644
--- a/src/barrier.cpp
+++ b/src/barrier.cpp
@@ -2,7 +2,7 @@
 // barrier.cpp: Rcpp R/C++ interface class library -- write barrier
 //
 // Copyright (C) 2010 - 2020  Dirk Eddelbuettel and Romain Francois
-// Copyright (C) 2021 - 2025  Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
+// Copyright (C) 2021 - 2026  Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
 //
 // This file is part of Rcpp.
 //
@@ -103,13 +103,13 @@ void Rcpp_precious_init() {
 	R_PreserveObject(Rcpp_precious); 			    // and protect
 }
 // [[Rcpp::register]]
-void Rcpp_precious_teardown() {
+void Rcpp_precious_teardown() {						// #nocov start
     R_ReleaseObject(Rcpp_precious);                 // release resource
-}
+}													// #nocov end
 // [[Rcpp::register]]
 SEXP Rcpp_precious_preserve(SEXP object) {
     if (object == R_NilValue) {
-        return R_NilValue;
+        return R_NilValue;							// #nocov
     }
     PROTECT(object);
     SEXP cell = PROTECT(CONS(Rcpp_precious, CDR(Rcpp_precious)));