diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b3fc220..cec1b15 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,9 +39,16 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
+
       # Check out your repository
       - uses: actions/checkout@v5
 
+      # Start display server (for UI tests in Linux)
+      - name: Start display server
+        run: |
+          Xvfb :99 & 
+          echo "DISPLAY=:99" >> $GITHUB_ENV
+
       # Set up MATLAB on a GitHub-hosted runner
       - name: Setup MATLAB
         uses: matlab-actions/setup-matlab@v2
@@ -49,11 +56,6 @@ jobs:
           products: ${{ env.PRODUCT_LIST }}
           cache: true
 
-      - name: Start display server (for UI tests in Linux)
-        run: |
-          Xvfb :99 & 
-          echo "DISPLAY=:99" >> $GITHUB_ENV
-
       # Run the MATLAB build tool to build and test your code
       - name: Run buildtool
         uses: matlab-actions/run-build@v2
@@ -72,7 +74,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
 
     # The type of runner that the job will run on
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -80,6 +82,12 @@ jobs:
       # Check out your repository
       - uses: actions/checkout@v5
       
+      # Start display server (for UI tests in Linux)
+      - name: Start display server
+        run: |
+          Xvfb :99 & 
+          echo "DISPLAY=:99" >> $GITHUB_ENV
+
       # Set up MATLAB on a GitHub-hosted runner
       - name: Setup MATLAB
         uses: matlab-actions/setup-matlab@v2
diff --git a/code/ConcTimecourseView.m b/code/ConcTimecourseView.m
index df6ea0a..57ca81c 100644
--- a/code/ConcTimecourseView.m
+++ b/code/ConcTimecourseView.m
@@ -6,6 +6,7 @@
         ConcColors = [0.30,0.75,0.93;...
                       0.86,0.55,0.41;...
                       0.91,0.73,0.42]; % colors to plot concentrations
+        LineWidth = 2.5
         FontName = "Helvetica";
     end
 
@@ -39,10 +40,10 @@
             xlabel(ax, "Time (hours)", 'FontName',obj.FontName);
             ylabel(ax, "Concentrations (nanomole/liter)",'FontName',obj.FontName);
 
-            obj.lhDrug = plot(ax, NaN, NaN, '-','Linewidth',2,'DisplayName','Drug');
+            obj.lhDrug = plot(ax, NaN, NaN, '-','Linewidth',obj.LineWidth,'DisplayName','Drug');
             hold(ax,'on');
-            obj.lhReceptor = plot(ax, NaN, NaN, '-','Linewidth',2,'DisplayName','Receptor');
-            obj.lhComplex= plot(ax, NaN, NaN, '-','Linewidth',2,'DisplayName','Complex');
+            obj.lhReceptor = plot(ax, NaN, NaN, '-','Linewidth',obj.LineWidth,'DisplayName','Receptor');
+            obj.lhComplex= plot(ax, NaN, NaN, '-','Linewidth',obj.LineWidth,'DisplayName','Complex');
             hold(ax,'off');
             lgd = legend(ax,'show','FontName',obj.FontName,'Color','none');
             lgd.Box = "off";
diff --git a/code/ROTimecourseView.m b/code/ROTimecourseView.m
index 35c3a7f..cea3fbb 100644
--- a/code/ROTimecourseView.m
+++ b/code/ROTimecourseView.m
@@ -5,6 +5,8 @@
 
         ThresholdStyle   = {'Color','r','Linewidth',2,'LineStyle','--',...
             'FontWeight','bold','LabelVerticalAlignment','middle'}; % style for threshold lines
+
+        Linewidth = 2.5
     end
 
     properties ( Hidden, SetAccess=private)
@@ -41,7 +43,7 @@
             xlabel(ax, "Time (hours)", 'FontName',obj.FontName);
             ylabel(ax, "RO (%)",'FontName',obj.FontName);
 
-            obj.lhRO = plot(ax, NaN, NaN,'Linewidth',2);
+            obj.lhRO = plot(ax, NaN, NaN,'Linewidth',obj.Linewidth);
             yline(ax,model.ThresholdValues(1), '--','efficacy','FontName',obj.FontName,obj.ThresholdStyle{:});
             yline(ax,model.ThresholdValues(2), '--','safety','FontName',obj.FontName,obj.ThresholdStyle{:});
             grid(ax,"on");