1 files changed, 8 insertions, 6 deletions
diff --git a/tests/scrollbar.test b/tests/scrollbar.test
index 097ab79..4963cf8 100644
--- a/tests/scrollbar.test
+++ b/tests/scrollbar.test
@@ -11,6 +11,8 @@ package require tcltest 2.2
 eval tcltest::configure $argv
 tcltest::loadTestedCommands
 
+testConstraint failsOnUbuntu [expr {![info exists ::env(TRAVIS_OS_NAME)] || ![string match linux $::env(TRAVIS_OS_NAME)]}]
+
 proc scroll args {
     global scrollInfo
     set scrollInfo $args
@@ -270,13 +272,13 @@ test scrollbar-3.35 {ScrollbarWidgetCmd procedure, "fraction" option} {
     format {%.6g} [.s fraction 4 21]
 } [format %.6g [expr {(21.0 - ([winfo height .s] - [getTroughSize .s])/2.0) \
        /([getTroughSize .s] - 1)}]]
-test scrollbar-3.36 {ScrollbarWidgetCmd procedure, "fraction" option} x11 {
+test scrollbar-3.36 {ScrollbarWidgetCmd procedure, "fraction" option} {x11 failsOnUbuntu} {
     format {%.6g} [.s fraction 4 179]
 } {1}
 test scrollbar-3.37 {ScrollbarWidgetCmd procedure, "fraction" option} {testmetrics} {
     format {%.6g} [.s fraction 4 [expr {200 - [testmetrics cyvscroll .s]}]]
 } {1}
-test scrollbar-3.38 {ScrollbarWidgetCmd procedure, "fraction" option} x11 {
+test scrollbar-3.38 {ScrollbarWidgetCmd procedure, "fraction" option} {x11 failsOnUbuntu} {
     format {%.6g} [.s fraction 4 178]
 } {0.993711}
 test scrollbar-3.39 {ScrollbarWidgetCmd procedure, "fraction" option} {testmetrics win} {
@@ -491,7 +493,7 @@ test scrollbar-6.11.2 {ScrollbarPosition procedure} aqua {
     # macOS scrollbars have no arrows nowadays
     .s identify 8 4
 } {trough1}
-test scrollbar-6.12.1 {ScrollbarPosition procedure} x11 {
+test scrollbar-6.12.1 {ScrollbarPosition procedure} {x11 failsOnUbuntu} {
     .s identify 8 19
 } {arrow1}
 test scrollbar-6.12.2 {ScrollbarPosition procedure} aqua {
@@ -549,7 +551,7 @@ test scrollbar-6.28 {ScrollbarPosition procedure} {testmetrics win} {
     .s identify [expr {[winfo width .s] / 2}] [expr {[winfo height .s]
 						 - [testmetrics cyvscroll .s] - 1}]
 } {trough2}
-test scrollbar-6.29.1 {ScrollbarPosition procedure} x11 {
+test scrollbar-6.29.1 {ScrollbarPosition procedure} {x11 failsOnUbuntu} {
     .s identify 8 180
 } {arrow2}
 test scrollbar-6.29.2 {ScrollbarPosition procedure} aqua {
@@ -573,7 +575,7 @@ test scrollbar-6.33 {ScrollbarPosition procedure} win {
 test scrollbar-6.34 {ScrollbarPosition procedure} unix {
     .s identify 4 100
 } {trough2}
-test scrollbar-6.35 {ScrollbarPosition procedure} unix {
+test scrollbar-6.35 {ScrollbarPosition procedure} {unix failsOnUbuntu} {
     .s identify 18 100
 } {trough2}
 test scrollbar-6.37 {ScrollbarPosition procedure} win {
@@ -612,7 +614,7 @@ test scrollbar-6.43 {ScrollbarPosition procedure} {testmetrics win} {
     .t.s identify [expr {int(.4 / [.t.s delta 1 0]) + [testmetrics cxhscroll .t.s]
 		       - 1}] [expr {[winfo height .t.s] / 2}]
 } {slider}
-test scrollbar-6.44 {ScrollbarPosition procedure} unix {
+test scrollbar-6.44 {ScrollbarPosition procedure} {unix failsOnUbuntu} {
     .t.s identify 100 18
 } {trough2}
 test scrollbar-6.46 {ScrollbarPosition procedure} win {