diff --git a/testsuite/modules.00-init/005-init_ts.exp b/testsuite/modules.00-init/005-init_ts.exp
index 65d88d08..f08a52cd 100644
--- a/testsuite/modules.00-init/005-init_ts.exp
+++ b/testsuite/modules.00-init/005-init_ts.exp
@@ -576,15 +576,15 @@ set is_stdin_tty [expr {![catch {fconfigure stdin -mode}]}]
 
 # locate Modules Tcl extension library used during testsuite
 if {$install_libtclenvmodules eq {y}} {
-    catch {set tclextlib_file [glob lib/libtclenvmodules*]}
-    catch {set closedirlib_file [glob lib/libtestutil-closedir*]}
-    catch {set getpwuidlib_file [glob lib/libtestutil-getpwuid*]}
-    catch {set getgroupslib_file [glob lib/libtestutil-getgroups*]}
-    catch {set 0getgroupslib_file [glob lib/libtestutil-0getgroups*]}
-    catch {set dupgetgroupslib_file [glob lib/libtestutil-dupgetgroups*]}
-    catch {set getgrgidlib_file [glob lib/libtestutil-getgrgid*]}
-    catch {set timelib_file [glob lib/libtestutil-time*]}
-    catch {set mktimelib_file [glob lib/libtestutil-mktime*]}
+    set tclextlib_file lib/libtclenvmodules$install_shlib_suffix
+    set closedirlib_file lib/libtestutil-closedir$install_shlib_suffix
+    set getpwuidlib_file lib/libtestutil-getpwuid$install_shlib_suffix
+    set getgroupslib_file lib/libtestutil-getgroups$install_shlib_suffix
+    set 0getgroupslib_file lib/libtestutil-0getgroups$install_shlib_suffix
+    set dupgetgroupslib_file lib/libtestutil-dupgetgroups$install_shlib_suffix
+    set getgrgidlib_file lib/libtestutil-getgrgid$install_shlib_suffix
+    set timelib_file lib/libtestutil-time$install_shlib_suffix
+    set mktimelib_file lib/libtestutil-mktime$install_shlib_suffix
 }
 
 # check file permission capabilities