diff --git a/library/tm.tcl b/library/tm.tcl
index 3c0ec2238182..c1a8f8ac0b16 100644
--- a/library/tm.tcl
+++ b/library/tm.tcl
@@ -316,7 +316,7 @@ proc ::tcl::tm::UnknownHandler {original name args} {
 proc ::tcl::tm::Defaults {} {
     global env tcl_platform
 
-    regexp {^(\d+)\.(\d+)} [package provide Tcl] - major minor
+    regexp {^(\d+)\.(\d+)} [package provide tcl] - major minor
     set exe [file normalize [info nameofexecutable]]
 
     # Note that we're using [::list], not [list] because [list] means
@@ -359,7 +359,7 @@ proc ::tcl::tm::Defaults {} {
 #	Calls 'path add' to paths to the list of module search paths.
 
 proc ::tcl::tm::roots {paths} {
-    regexp {^(\d+)\.(\d+)} [package provide Tcl] - major minor
+    regexp {^(\d+)\.(\d+)} [package provide tcl] - major minor
     foreach pa $paths {
 	set p [file join $pa tcl$major]
 	for {set n $minor} {$n >= 0} {incr n -1} {
diff --git a/tests/tm.test b/tests/tm.test
index 4dea27d84a81..a1959e6697b1 100644
--- a/tests/tm.test
+++ b/tests/tm.test
@@ -199,7 +199,7 @@ test tm-3.11 {tm: module path management, remove ignores unknown path} -setup {
 proc genpaths {base} {
     # Normalizing picks up drive letters on windows [Bug 1053568]
     set base [file normalize $base]
-    regexp {^(\d+)\.(\d+)} [package provide Tcl] - major minor
+    regexp {^(\d+)\.(\d+)} [package provide tcl] - major minor
     set results {}
     set base [file join $base tcl$major]
     lappend results [file join $base site-tcl]
diff --git a/unix/dltest/pkgb.c b/unix/dltest/pkgb.c
index 3210669765b6..ebed46d0d580 100644
--- a/unix/dltest/pkgb.c
+++ b/unix/dltest/pkgb.c
@@ -152,7 +152,7 @@ Pkgb_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
+    code = Tcl_PkgProvide(interp, "pkgb", "2.3");
     if (code != TCL_OK) {
 	return code;
     }
@@ -189,7 +189,7 @@ Pkgb_SafeInit(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
+    code = Tcl_PkgProvide(interp, "pkgb", "2.3");
     if (code != TCL_OK) {
 	return code;
     }
diff --git a/unix/dltest/pkgd.c b/unix/dltest/pkgd.c
index 5c799f5ffb20..ef0035f65698 100644
--- a/unix/dltest/pkgd.c
+++ b/unix/dltest/pkgd.c
@@ -121,7 +121,7 @@ Pkgd_Init(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "PKGD", "7.3");
+    code = Tcl_PkgProvide(interp, "pkgd", "7.3");
     if (code != TCL_OK) {
 	return code;
     }
@@ -158,7 +158,7 @@ Pkgd_SafeInit(
     if (Tcl_InitStubs(interp, "8.5-", 0) == NULL) {
 	return TCL_ERROR;
     }
-    code = Tcl_PkgProvide(interp, "PKGD", "7.3");
+    code = Tcl_PkgProvide(interp, "pkgd", "7.3");
     if (code != TCL_OK) {
 	return code;
     }