diff --git a/testsuite/install.00-init/010-environ.exp b/testsuite/install.00-init/010-environ.exp
index 828b995e..425ae7b9 100644
--- a/testsuite/install.00-init/010-environ.exp
+++ b/testsuite/install.00-init/010-environ.exp
@@ -52,6 +52,9 @@ if {[info exists install_quarlist]} {
 # clean any automated handling mode configuration
 catch {unset env(MODULES_AUTO_HANDLING)}
 
+# ensure tests are run with implicit requirement enabled
+set env(MODULES_IMPLICIT_REQUIREMENT) 1
+
 # clean any in depth mode configuration
 catch {unset env(MODULES_AVAIL_INDEPTH)}
 
diff --git a/testsuite/modules.00-init/010-environ.exp b/testsuite/modules.00-init/010-environ.exp
index d6ddc2d6..53c1a108 100644
--- a/testsuite/modules.00-init/010-environ.exp
+++ b/testsuite/modules.00-init/010-environ.exp
@@ -49,6 +49,9 @@ foreach var [array names env] {
 # clean any automated handling mode configuration
 catch {unset env(MODULES_AUTO_HANDLING)}
 
+# ensure tests are run with implicit requirement enabled
+setenv_var MODULES_IMPLICIT_REQUIREMENT 1
+
 # clean any in depth mode configuration
 catch {unset env(MODULES_AVAIL_INDEPTH)}
 
diff --git a/testsuite/modules.70-maint/220-config.exp b/testsuite/modules.70-maint/220-config.exp
index 432fb0c4..2fc4205d 100644
--- a/testsuite/modules.70-maint/220-config.exp
+++ b/testsuite/modules.70-maint/220-config.exp
@@ -24,6 +24,7 @@
 unsetenv_var MODULES_VERBOSITY
 unsetenv_var MODULES_EXTENDED_DEFAULT
 unsetenv_var MODULES_COLOR
+unsetenv_var MODULES_IMPLICIT_REQUIREMENT
 unsetenv_var MODULERCFILE
 if {[info exists env(MODULES_ICASE)]} {
     set saved_icase $env(MODULES_ICASE)
@@ -377,6 +378,7 @@ unsetenv_var MODULES_RUNENV_FOO
 setenv_var MODULES_VERBOSITY normal
 setenv_var MODULES_EXTENDED_DEFAULT 0
 setenv_var MODULES_COLOR never
+setenv_var MODULES_IMPLICIT_REQUIREMENT 1
 setenv_var MODULERCFILE $env(TESTSUITEDIR)/etc/empty
 if {[info exists saved_icase]} {
     setenv_var MODULES_ICASE $saved_icase