diff --git a/scripts/test-libs.ps1 b/scripts/test-libs.ps1
index 02449afa..b63f2782 100644
--- a/scripts/test-libs.ps1
+++ b/scripts/test-libs.ps1
@@ -1,2 +1,7 @@
 param([string]$path)
+if ((Get-ChildItem "$path/TestData" -ErrorAction SilentlyContinue | Measure-Object).Count -eq 0) {
+    New-Item -Type Directory -ErrorAction SilentlyContinue "$path/TestData"
+    Invoke-WebRequest https://fits.gsfc.nasa.gov/samples/UITfuv2582gc.fits -OutFile "$path/TestData/UITfuv2582gc.fits"
+    Invoke-WebRequest https://fits.gsfc.nasa.gov/nrao_data/tests/nost_headers/bitpix13.fits -OutFile "$path/TestData/unsupp_bitpix.fits"
+}
 dotnet test $path -c Release 
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