diff --git a/test/src/StackTrace.zig b/test/src/StackTrace.zig
index 5709b9d29ebebd1ffb21297a885901e71a139be3..c32720a210b33960bd44f02781cf17054a494858 100644
--- a/test/src/StackTrace.zig
+++ b/test/src/StackTrace.zig
@@ -82,6 +82,8 @@ fn addExpect(
     });
 
     const run = b.addRunArtifact(exe);
+    run.removeEnvironmentVariable("ZIG_DEBUG_COLOR");
+    run.setEnvironmentVariable("NO_COLOR", "1");
     run.expectExitCode(1);
     run.expectStdOutEqual("");