diff --git a/.github/workflows/SnoopCompile.yml b/.github/workflows/SnoopCompile.yml
index a3aa47d2..ec79b312 100644
--- a/.github/workflows/SnoopCompile.yml
+++ b/.github/workflows/SnoopCompile.yml
@@ -48,7 +48,7 @@ jobs:
         run: echo ::set-env name=TESTCMD::"julia"
       - name: Ubuntu TESTCMD
         if: startsWith(matrix.os,'ubuntu')
-        run: echo ::set-env name=TESTCMD::"xvfb-run julia"
+        run: echo ::set-env name=TESTCMD::"xvfb-run --auto-servernum julia"
 
       # Generate precompile files
       - name: Generating precompile files
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81d25df2..603e3b04 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,7 +63,7 @@ jobs:
         run: echo ::set-env name=TESTCMD::"julia"
       - name: Ubuntu TESTCMD
         if: startsWith(matrix.os,'ubuntu')
-        run: echo ::set-env name=TESTCMD::"xvfb-run julia"
+        run: echo ::set-env name=TESTCMD::"xvfb-run --auto-servernum julia"
 
       # Julia Dependencies
       - name: Install Julia dependencies