diff --git a/src/cmd/api/api_test.go b/src/cmd/api/api_test.go
index 98ebf168ef3949..784bdb74e428e0 100644
--- a/src/cmd/api/api_test.go
+++ b/src/cmd/api/api_test.go
@@ -232,7 +232,6 @@ var warmupCache = sync.OnceFunc(func() {
 	// Warm up the import cache in parallel.
 	var wg sync.WaitGroup
 	for _, context := range contexts {
-		context := context
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
diff --git a/src/cmd/cgo/internal/testerrors/errors_test.go b/src/cmd/cgo/internal/testerrors/errors_test.go
index 80d2c402cec0c2..aa61577ea3cb39 100644
--- a/src/cmd/cgo/internal/testerrors/errors_test.go
+++ b/src/cmd/cgo/internal/testerrors/errors_test.go
@@ -152,7 +152,6 @@ func TestToleratesOptimizationFlag(t *testing.T) {
 		"",
 		"-O",
 	} {
-		cflags := cflags
 		t.Run(cflags, func(t *testing.T) {
 			testenv.MustHaveGoBuild(t)
 			testenv.MustHaveCGO(t)
diff --git a/src/cmd/cgo/internal/testsanitizers/asan_test.go b/src/cmd/cgo/internal/testsanitizers/asan_test.go
index cb7d857280416f..a2d420402018e7 100644
--- a/src/cmd/cgo/internal/testsanitizers/asan_test.go
+++ b/src/cmd/cgo/internal/testsanitizers/asan_test.go
@@ -48,7 +48,6 @@ func TestASAN(t *testing.T) {
 		{src: "arena_fail.go", memoryAccessError: "use-after-poison", errorLocation: "arena_fail.go:26", experiments: []string{"arenas"}},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
diff --git a/src/cmd/cgo/internal/testsanitizers/cshared_test.go b/src/cmd/cgo/internal/testsanitizers/cshared_test.go
index 0cf094ead79e66..fc30204262acfe 100644
--- a/src/cmd/cgo/internal/testsanitizers/cshared_test.go
+++ b/src/cmd/cgo/internal/testsanitizers/cshared_test.go
@@ -54,7 +54,6 @@ func TestShared(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		//The memory sanitizer tests require support for the -msan option.
 		if tc.sanitizer == "memory" && !platform.MSanSupported(GOOS, GOARCH) {
diff --git a/src/cmd/cgo/internal/testsanitizers/libfuzzer_test.go b/src/cmd/cgo/internal/testsanitizers/libfuzzer_test.go
index 9f548d66eace03..6749709ddd8d45 100644
--- a/src/cmd/cgo/internal/testsanitizers/libfuzzer_test.go
+++ b/src/cmd/cgo/internal/testsanitizers/libfuzzer_test.go
@@ -43,7 +43,6 @@ func TestLibFuzzer(t *testing.T) {
 		{goSrc: "libfuzzer2.go", cSrc: "libfuzzer2.c", expectedError: "panic: found it"},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.goSrc, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
diff --git a/src/cmd/cgo/internal/testsanitizers/msan_test.go b/src/cmd/cgo/internal/testsanitizers/msan_test.go
index 554cceaff88669..811a1438397eb0 100644
--- a/src/cmd/cgo/internal/testsanitizers/msan_test.go
+++ b/src/cmd/cgo/internal/testsanitizers/msan_test.go
@@ -62,7 +62,6 @@ func TestMSAN(t *testing.T) {
 		{src: "arena_fail.go", wantErr: true, experiments: []string{"arenas"}},
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
diff --git a/src/cmd/cgo/internal/testsanitizers/tsan_test.go b/src/cmd/cgo/internal/testsanitizers/tsan_test.go
index 589db2e6bc4e34..81fc00900f9e37 100644
--- a/src/cmd/cgo/internal/testsanitizers/tsan_test.go
+++ b/src/cmd/cgo/internal/testsanitizers/tsan_test.go
@@ -59,7 +59,6 @@ func TestTSAN(t *testing.T) {
 		{src: "tsan_tracebackctxt", needsRuntime: true}, // Subdirectory
 	}
 	for _, tc := range cases {
-		tc := tc
 		name := strings.TrimSuffix(tc.src, ".go")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
diff --git a/src/cmd/cgo/internal/teststdio/stdio_test.go b/src/cmd/cgo/internal/teststdio/stdio_test.go
index 9150281ae87ff3..f9e7fe507989f4 100644
--- a/src/cmd/cgo/internal/teststdio/stdio_test.go
+++ b/src/cmd/cgo/internal/teststdio/stdio_test.go
@@ -56,7 +56,6 @@ func TestTestRun(t *testing.T) {
 		"fib.go",
 		"hello.go",
 	} {
-		file := file
 		wantFile := strings.Replace(file, ".go", ".out", 1)
 		t.Run(file, func(t *testing.T) {
 			cmd := exec.Command(testenv.GoToolPath(t), "run", file)
diff --git a/src/cmd/compile/internal/test/reproduciblebuilds_test.go b/src/cmd/compile/internal/test/reproduciblebuilds_test.go
index 466e0c3a38ae1b..b2ff4068a8a86a 100644
--- a/src/cmd/compile/internal/test/reproduciblebuilds_test.go
+++ b/src/cmd/compile/internal/test/reproduciblebuilds_test.go
@@ -26,7 +26,6 @@ func TestReproducibleBuilds(t *testing.T) {
 	}
 	t.Parallel()
 	for _, test := range tests {
-		test := test
 		t.Run(test, func(t *testing.T) {
 			t.Parallel()
 			var want []byte
diff --git a/src/cmd/compile/internal/test/ssa_test.go b/src/cmd/compile/internal/test/ssa_test.go
index 7d213fcecac458..10f32f65ad9fd9 100644
--- a/src/cmd/compile/internal/test/ssa_test.go
+++ b/src/cmd/compile/internal/test/ssa_test.go
@@ -163,7 +163,6 @@ func TestCode(t *testing.T) {
 
 		// Now we have a test binary. Run it with all the tests as subtests of this one.
 		for _, test := range tests {
-			test := test
 			if flag == ",softfloat" && !test.usesFloat {
 				// No point in running the soft float version if the test doesn't use floats.
 				continue
diff --git a/src/cmd/compile/internal/types2/api_test.go b/src/cmd/compile/internal/types2/api_test.go
index 4b7012e6c45e9f..376fc46fb235f6 100644
--- a/src/cmd/compile/internal/types2/api_test.go
+++ b/src/cmd/compile/internal/types2/api_test.go
@@ -2420,7 +2420,6 @@ type K = Nested[string]
 		)
 		var wg sync.WaitGroup
 		for i := 0; i < 2; i++ {
-			i := i
 			wg.Add(1)
 			go func() {
 				defer wg.Done()
@@ -2599,7 +2598,6 @@ func fn() {
 	})
 
 	for _, test := range tests {
-		test := test
 		t.Run(test.name, func(t *testing.T) {
 			if got := len(idents[test.name]); got != 1 {
 				t.Fatalf("found %d identifiers named %s, want 1", got, test.name)
diff --git a/src/cmd/compile/internal/types2/sizes_test.go b/src/cmd/compile/internal/types2/sizes_test.go
index 9a772f4b1523fe..9597db58cb983d 100644
--- a/src/cmd/compile/internal/types2/sizes_test.go
+++ b/src/cmd/compile/internal/types2/sizes_test.go
@@ -184,7 +184,6 @@ func main() {
 func TestGCSizes(t *testing.T) {
 	types2.DefPredeclaredTestFuncs()
 	for _, tc := range gcSizesTests {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 			conf := types2.Config{Importer: defaultImporter(), Sizes: types2.SizesFor("gc", "amd64")}
diff --git a/src/cmd/compile/internal/types2/stdlib_test.go b/src/cmd/compile/internal/types2/stdlib_test.go
index f778a01a7adb07..1ce7c53fe1e85d 100644
--- a/src/cmd/compile/internal/types2/stdlib_test.go
+++ b/src/cmd/compile/internal/types2/stdlib_test.go
@@ -59,7 +59,6 @@ func TestStdlib(t *testing.T) {
 	var wg sync.WaitGroup
 
 	for dir := range dirFiles {
-		dir := dir
 
 		cpulimit <- struct{}{}
 		wg.Add(1)
diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go
index 1722f1a2c34428..875844802acafc 100644
--- a/src/cmd/go/go_test.go
+++ b/src/cmd/go/go_test.go
@@ -1545,7 +1545,6 @@ func TestListTemplateContextFunction(t *testing.T) {
 		{"ReleaseTags", ""},
 		{"InstallSuffix", ""},
 	} {
-		tt := tt
 		t.Run(tt.v, func(t *testing.T) {
 			tg := testgo(t)
 			tg.parallel()
diff --git a/src/cmd/go/internal/modfetch/coderepo_test.go b/src/cmd/go/internal/modfetch/coderepo_test.go
index 68594746601a22..d8d7580fd4af44 100644
--- a/src/cmd/go/internal/modfetch/coderepo_test.go
+++ b/src/cmd/go/internal/modfetch/coderepo_test.go
@@ -819,7 +819,6 @@ func TestCodeRepoVersions(t *testing.T) {
 	testenv.MustHaveExternalNetwork(t)
 
 	for _, tt := range codeRepoVersionsTests {
-		tt := tt
 		t.Run(strings.ReplaceAll(tt.path, "/", "_"), func(t *testing.T) {
 			if strings.Contains(tt.path, "gopkg.in") {
 				testenv.SkipFlaky(t, 54503)
@@ -902,7 +901,6 @@ func TestLatest(t *testing.T) {
 	for _, tt := range latestTests {
 		name := strings.ReplaceAll(tt.path, "/", "_")
 		t.Run(name, func(t *testing.T) {
-			tt := tt
 			t.Parallel()
 			if tt.vcs != "mod" {
 				testenv.MustHaveExecPath(t, tt.vcs)
diff --git a/src/cmd/go/internal/modload/query_test.go b/src/cmd/go/internal/modload/query_test.go
index a465fab5db3933..e435c95b816192 100644
--- a/src/cmd/go/internal/modload/query_test.go
+++ b/src/cmd/go/internal/modload/query_test.go
@@ -179,7 +179,6 @@ func TestQuery(t *testing.T) {
 			}
 			return nil
 		}
-		tt := tt
 		t.Run(strings.ReplaceAll(tt.path, "/", "_")+"/"+tt.query+"/"+tt.current+"/"+allow, func(t *testing.T) {
 			t.Parallel()
 
diff --git a/src/cmd/go/internal/web/url_test.go b/src/cmd/go/internal/web/url_test.go
index 8f462f53259b5c..5e7a2a882ebb41 100644
--- a/src/cmd/go/internal/web/url_test.go
+++ b/src/cmd/go/internal/web/url_test.go
@@ -14,7 +14,6 @@ func TestURLToFilePath(t *testing.T) {
 		if tc.url == "" {
 			continue
 		}
-		tc := tc
 
 		t.Run(tc.url, func(t *testing.T) {
 			u, err := url.Parse(tc.url)
@@ -46,7 +45,6 @@ func TestURLFromFilePath(t *testing.T) {
 		if tc.filePath == "" {
 			continue
 		}
-		tc := tc
 
 		t.Run(tc.filePath, func(t *testing.T) {
 			u, err := urlFromFilePath(tc.filePath)
diff --git a/src/cmd/go/script_test.go b/src/cmd/go/script_test.go
index 390a36723787f4..f6eaddf8fb3f40 100644
--- a/src/cmd/go/script_test.go
+++ b/src/cmd/go/script_test.go
@@ -107,7 +107,6 @@ func TestScript(t *testing.T) {
 		t.Fatal(err)
 	}
 	for _, file := range files {
-		file := file
 		name := strings.TrimSuffix(filepath.Base(file), ".txt")
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
diff --git a/src/cmd/internal/par/queue_test.go b/src/cmd/internal/par/queue_test.go
index 1331e65f98a81f..4d2bcf09febf62 100644
--- a/src/cmd/internal/par/queue_test.go
+++ b/src/cmd/internal/par/queue_test.go
@@ -51,7 +51,6 @@ func TestQueueBacklog(t *testing.T) {
 	unblock := make(chan struct{})
 	for i := range started {
 		started[i] = make(chan struct{})
-		i := i
 		q.Add(func() {
 			close(started[i])
 			<-unblock
diff --git a/src/cmd/link/dwarf_test.go b/src/cmd/link/dwarf_test.go
index 56a076002a92d4..291d67f2b770e4 100644
--- a/src/cmd/link/dwarf_test.go
+++ b/src/cmd/link/dwarf_test.go
@@ -82,7 +82,6 @@ func testDWARF(t *testing.T, buildmode string, expectDWARF bool, env ...string)
 	t.Parallel()
 
 	for _, prog := range []string{"testprog", "testprogcgo"} {
-		prog := prog
 		expectDWARF := expectDWARF
 		if runtime.GOOS == "aix" && prog == "testprogcgo" {
 			extld := os.Getenv("CC")
diff --git a/src/cmd/link/internal/ld/deadcode_test.go b/src/cmd/link/internal/ld/deadcode_test.go
index 6962a4eba01195..95de54d54adc98 100644
--- a/src/cmd/link/internal/ld/deadcode_test.go
+++ b/src/cmd/link/internal/ld/deadcode_test.go
@@ -34,7 +34,6 @@ func TestDeadcode(t *testing.T) {
 			[]string{"main.large"}},
 	}
 	for _, test := range tests {
-		test := test
 		t.Run(test.src, func(t *testing.T) {
 			t.Parallel()
 			src := filepath.Join("testdata", "deadcode", test.src+".go")
diff --git a/src/cmd/link/internal/ld/dwarf_test.go b/src/cmd/link/internal/ld/dwarf_test.go
index cc493f2c699814..7d76a06250a4d4 100644
--- a/src/cmd/link/internal/ld/dwarf_test.go
+++ b/src/cmd/link/internal/ld/dwarf_test.go
@@ -408,7 +408,6 @@ func main() {}
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
@@ -473,7 +472,6 @@ func main() {
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
@@ -555,7 +553,6 @@ func main() {
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
@@ -1980,7 +1977,6 @@ func TestZeroSizedVariable(t *testing.T) {
 	// See go.dev/issues/54615.
 
 	for _, opt := range []string{NoOpt, DefaultOpt} {
-		opt := opt
 		t.Run(opt, func(t *testing.T) {
 			_, ex := gobuildAndExamine(t, zeroSizedVarProg, opt)
 
diff --git a/src/cmd/link/internal/ld/ld_test.go b/src/cmd/link/internal/ld/ld_test.go
index 64b86f3a0b1153..d6f76347475d40 100644
--- a/src/cmd/link/internal/ld/ld_test.go
+++ b/src/cmd/link/internal/ld/ld_test.go
@@ -354,7 +354,6 @@ func main() {
 		},
 	}
 	for _, tt := range tests {
-		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
 			tempDir := t.TempDir()
diff --git a/src/cmd/link/link_test.go b/src/cmd/link/link_test.go
index 6ab1246c814dfb..e122e102766768 100644
--- a/src/cmd/link/link_test.go
+++ b/src/cmd/link/link_test.go
@@ -1622,7 +1622,6 @@ func TestCheckLinkname(t *testing.T) {
 		{"badlinkname.go", true},
 	}
 	for _, test := range tests {
-		test := test
 		t.Run(test.src, func(t *testing.T) {
 			t.Parallel()
 			src := "./testdata/linkname/" + test.src
diff --git a/src/os/os_windows_test.go b/src/os/os_windows_test.go
index 3e7bddc791154c..c680fd1308c06a 100644
--- a/src/os/os_windows_test.go
+++ b/src/os/os_windows_test.go
@@ -1234,7 +1234,6 @@ func TestReadlink(t *testing.T) {
 		{junction: false, dir: false, drive: false, relative: true},
 	}
 	for _, tt := range tests {
-		tt := tt
 		var name string
 		if tt.junction {
 			name = "junction"
diff --git a/src/runtime/panic_test.go b/src/runtime/panic_test.go
index 2b06bce45d260e..8ffe9383e9fca3 100644
--- a/src/runtime/panic_test.go
+++ b/src/runtime/panic_test.go
@@ -39,7 +39,6 @@ func TestPanicWithDirectlyPrintableCustomTypes(t *testing.T) {
 	}
 
 	for _, tt := range tests {
-		t := t
 		t.Run(tt.name, func(t *testing.T) {
 			output := runTestProg(t, "testprog", tt.name)
 			if !strings.HasPrefix(output, tt.wantPanicPrefix) {
diff --git a/src/runtime/syscall_windows_test.go b/src/runtime/syscall_windows_test.go
index 6a9b165d62422e..ce74883f1d98ac 100644
--- a/src/runtime/syscall_windows_test.go
+++ b/src/runtime/syscall_windows_test.go
@@ -778,7 +778,6 @@ func TestSyscallN(t *testing.T) {
 	}
 
 	for arglen := 0; arglen <= windows.MaxArgs; arglen++ {
-		arglen := arglen
 		t.Run(fmt.Sprintf("arg-%d", arglen), func(t *testing.T) {
 			t.Parallel()
 			args := make([]string, arglen)