diff --git a/.envrc b/.envrc
index 1b5f158..5816063 100644
--- a/.envrc
+++ b/.envrc
@@ -1,5 +1,2 @@
-# Insert our scripts into the path.
 export PATH=$PWD/scripts:$PATH
-
-# Nix flakes are awesome.
-use flake
+use flake || use nix
diff --git a/scripts/test.sh b/scripts/test.sh
index bb106ee..7587fb1 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -1,8 +1,12 @@
 #!/usr/bin/env sh
 
 cd $(dirname $0)/..
-./scripts/setup.sh || exit 1
 
-dotnet test --test-adapter-path:. --logger:"junit;LogFilePath=../artifacts/{assembly}-test-result.xml;MethodFormat=Default;FailureBodyFormat=Verbose" --collect:"XPlat Code Coverage"
-dotnet tool run reportgenerator -reports:tests/*/TestResults/*/coverage.cobertura.xml -targetdir:./coverage "-reporttypes:Cobertura;TextSummary"
-grep "Line coverage" coverage/Summary.txt
+if [ -f ./tests/*/*.csproj ]
+then
+  ./scripts/setup.sh || exit 1
+
+  dotnet test --test-adapter-path:. --logger:"junit;LogFilePath=../artifacts/{assembly}-test-result.xml;MethodFormat=Default;FailureBodyFormat=Verbose" --collect:"XPlat Code Coverage"
+  dotnet tool run reportgenerator -reports:tests/*/TestResults/*/coverage.cobertura.xml -targetdir:./coverage "-reporttypes:Cobertura;TextSummary"
+  grep "Line coverage" coverage/Summary.txt
+fi