diff --git a/docs/test_dependencies.md b/docs/test_dependencies.md
index e3fed7e..4a02578 100644
--- a/docs/test_dependencies.md
+++ b/docs/test_dependencies.md
@@ -44,8 +44,6 @@
 * `biometrics_daemon` - The ability to process fingerprint authentication.
     This implies the presence of the `biod` package.
 * `boot_perf_info` - Reven (ChromeOS Flex) doesn't support boot performance metrics.
-* `borealis_host` - Boards that can host the Borealis system.
-* `borealis_nvidia` - Boards that use nvidia supported Borealis system.
 * `bpf` - Whether the platform (kernel) has the bpf syscall enabled.
 * `breakpad` - Whether the platform supports the breakpad crash handler
     for Chrome.
@@ -159,7 +157,6 @@
     the `android` feature; DUTs will have exactly one of these two features.
 * `no_arm` - The absence of [arm] 32 bit userspace.
 * `no_asan` - Build was not built with Address Sanitizer. Similar to `aslr`.
-* `no_borealis_host` - Boards which is not designed to host borealis.
 * `no_camera_feature_super_res` - Whether single frame super resolution is disabled on this platform.
 * `no_chrome_dcheck` - Chrome/Chromium was not built with dcheck enabld.
 * `no_downloads_bind_mount` - Disable Downloads bind mount and migrate files from ~/Downloads to ~/MyFiles/Downloads.
diff --git a/src/go.chromium.org/tast/core/internal/crosbundle/software_defs.go b/src/go.chromium.org/tast/core/internal/crosbundle/software_defs.go
index 5d7b495..6d3daf0 100644
--- a/src/go.chromium.org/tast/core/internal/crosbundle/software_defs.go
+++ b/src/go.chromium.org/tast/core/internal/crosbundle/software_defs.go
@@ -39,10 +39,6 @@
 	"auto_update_stable": `!("board:*-*")`,
 	"biometrics_daemon":  "biod",
 	"boot_perf_info":     `!("board:reven*")`, // Reven (ChromeOS Flex) doesn't support boot performance metrics.
-	"borealis_host":      "borealis_host",
-	"borealis_nvidia":    "borealis_nvidia",
-	// borealis_host but with boards that have precompield shader cache enabled
-	"borealis_precompiled_cache_enabled": `borealis_host && ("board:brya" || "board:guybrush" || "board:hatch" || "board:nissa" || "board:rex" || "board:skyrim" || "board:volteer")`,
 	// The bpf syscall is enabled on CrOS since kernel v5.10.
 	"bpf":      `!("kernel-4_14" || "kernel-4_19" || "kernel-5_4")`,
 	"breakpad": "force_breakpad",
@@ -211,7 +207,6 @@
 	"no_arcvm_virtio_blk_data":    "!(arcvm_virtio_blk_data || arcvm_data_migration)",
 	"no_arm":                      "!arm",
 	"no_asan":                     "!asan",
-	"no_borealis_host":            "!borealis_host",
 	"no_brya_kernelnext":          `!("board:brya-kernelnext")`,
 	"no_camera_feature_super_res": "!camera_feature_super_res",
 	"no_chrome_dcheck":            "!chrome_dcheck",
diff --git a/src/go.chromium.org/tast/core/internal/testing/attr.go b/src/go.chromium.org/tast/core/internal/testing/attr.go
index d76e35a..b6c4c65 100644
--- a/src/go.chromium.org/tast/core/internal/testing/attr.go
+++ b/src/go.chromium.org/tast/core/internal/testing/attr.go
@@ -302,10 +302,6 @@
 				Desc: "Release candidate autoupdate tests",
 			},
 			{
-				Name: "release-health_borealis",
-				Desc: "Release candidate borealis tests",
-			},
-			{
 				Name: "release-health_bt",
 				Desc: "Release candidate bluetooth tests",
 			},
@@ -1773,37 +1769,6 @@
 		},
 	},
 	{
-		Name:     "borealis",
-		Contacts: []string{"chromeos-gaming@google.com"},
-		Desc:     `Borealis related tests.`,
-		Subattrs: []*attr{
-			{
-				Name: "borealis_cq",
-				Desc: `Indicate this test should be scheduled on cq.`,
-			},
-			{
-				Name: "borealis_perbuild",
-				Desc: `Indicate this test should be scheduled per build.`,
-			},
-			{
-				Name: "borealis_nightly",
-				Desc: `Indicate this test should be scheduled per day.`,
-			},
-			{
-				Name: "borealis_stress",
-				Desc: `Indicate this is a stress test that should be scheduled on the Borealis satlab.`,
-			},
-			{
-				Name: "borealis_weekly",
-				Desc: `Indicate this test should be scheduled per week.`,
-			},
-			{
-				Name: "informational",
-				Desc: `Indicates that failures can be ignored.`,
-			},
-		},
-	},
-	{
 		Name:     "cross-device",
 		Contacts: []string{"chromeos-sw-engprod@google.com"},
 		Desc:     `A group of tests that test Cross Device functionality between CrOS and Android devices.`,