diff --git a/builder/file/builder.go b/builder/file/builder.go
index 0f79c958fe8..34c9fa2cd2f 100644
--- a/builder/file/builder.go
+++ b/builder/file/builder.go
@@ -16,7 +16,6 @@ import (
 	"path/filepath"
 
 	"github.com/hashicorp/hcl/v2/hcldec"
-	"github.com/hashicorp/packer-plugin-sdk/multistep"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 )
 
@@ -24,7 +23,6 @@ const BuilderId = "packer.file"
 
 type Builder struct {
 	config Config
-	runner multistep.Runner
 }
 
 func (b *Builder) ConfigSpec() hcldec.ObjectSpec { return b.config.FlatMapstructure().HCL2Spec() }
diff --git a/builder/null/config_test.go b/builder/null/config_test.go
index 67d35f66972..72272397ae5 100644
--- a/builder/null/config_test.go
+++ b/builder/null/config_test.go
@@ -18,19 +18,6 @@ func testConfig() map[string]interface{} {
 	}
 }
 
-func testConfigStruct(t *testing.T) *Config {
-	var c Config
-	warns, errs := c.Prepare(testConfig())
-	if len(warns) > 0 {
-		t.Fatalf("bad: %#v", len(warns))
-	}
-	if errs != nil {
-		t.Fatalf("bad: %#v", errs)
-	}
-
-	return &c
-}
-
 func testConfigErr(t *testing.T, warns []string, err error) {
 	if len(warns) > 0 {
 		t.Fatalf("bad: %#v", warns)
diff --git a/command/config_file_unix.go b/command/config_file_unix.go
deleted file mode 100644
index ec3932f9e0b..00000000000
--- a/command/config_file_unix.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright (c) HashiCorp, Inc.
-// SPDX-License-Identifier: BUSL-1.1
-
-//go:build darwin || freebsd || linux || netbsd || openbsd || solaris
-// +build darwin freebsd linux netbsd openbsd solaris
-
-package command
-
-const (
-	defaultConfigDir = ".packer.d"
-)
diff --git a/command/config_file_windows.go b/command/config_file_windows.go
deleted file mode 100644
index ede0a618687..00000000000
--- a/command/config_file_windows.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright (c) HashiCorp, Inc.
-// SPDX-License-Identifier: BUSL-1.1
-
-//go:build windows
-// +build windows
-
-package command
-
-const (
-	defaultConfigDir = "packer.d"
-)
diff --git a/command/init_test.go b/command/init_test.go
index 4a0c44be945..b8a02f3a118 100644
--- a/command/init_test.go
+++ b/command/init_test.go
@@ -6,7 +6,6 @@
 package command
 
 import (
-	"context"
 	"fmt"
 	"log"
 	"os"
@@ -16,7 +15,6 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-	"github.com/hashicorp/go-getter/v2"
 	"github.com/hashicorp/packer-plugin-sdk/acctest"
 	"golang.org/x/mod/sumdb/dirhash"
 )
@@ -312,17 +310,6 @@ func (key skipInitTestUnlessEnVar) fn(t *testing.T, tc testCaseInit) {
 	// }
 }
 
-type initTestGoGetPlugin struct {
-	Src string
-	Dst string
-}
-
-func (opts initTestGoGetPlugin) fn(t *testing.T, _ testCaseInit) {
-	if _, err := getter.Get(context.Background(), opts.Dst, opts.Src); err != nil {
-		t.Fatalf("get: %v", err)
-	}
-}
-
 // TestInitCmd aims to test the init command, with output validation
 func TestInitCmd(t *testing.T) {
 	tests := []struct {
diff --git a/hcl2template/common_test.go b/hcl2template/common_test.go
index 831ce5d3596..08cdc3f6782 100644
--- a/hcl2template/common_test.go
+++ b/hcl2template/common_test.go
@@ -205,17 +205,6 @@ var (
 		Datasource: "string",
 	}
 
-	basicMockBuilder = &MockBuilder{
-		Config: MockConfig{
-			NestedMockConfig: builderBasicNestedMockConfig,
-			Nested:           builderBasicNestedMockConfig,
-			NestedSlice: []NestedMockConfig{
-				builderBasicNestedMockConfig,
-				builderBasicNestedMockConfig,
-			},
-		},
-	}
-
 	basicMockProvisioner = &MockProvisioner{
 		Config: MockConfig{
 			NotSquashed:      "value <UNKNOWN>",
@@ -273,17 +262,6 @@ var (
 			NestedSlice: []NestedMockConfig{},
 		},
 	}
-	basicMockCommunicator = &MockCommunicator{
-		Config: MockConfig{
-			NestedMockConfig: basicNestedMockConfig,
-			Nested:           basicNestedMockConfig,
-			NestedSlice: []NestedMockConfig{
-				{
-					Tags: []MockTag{},
-				},
-			},
-		},
-	}
 
 	emptyMockBuilder = &MockBuilder{
 		Config: MockConfig{
@@ -295,13 +273,6 @@ var (
 		},
 	}
 
-	emptyMockProvisioner = &MockProvisioner{
-		Config: MockConfig{
-			NestedMockConfig: NestedMockConfig{Tags: []MockTag{}},
-			NestedSlice:      []NestedMockConfig{},
-		},
-	}
-
 	dynamicTagList = []MockTag{
 		{
 			Key:   "first_tag_key",
diff --git a/hcl2template/functions.go b/hcl2template/functions.go
index 5340f34dded..7089201bc2d 100644
--- a/hcl2template/functions.go
+++ b/hcl2template/functions.go
@@ -6,7 +6,6 @@ package hcl2template
 import (
 	"bytes"
 	"encoding/base64"
-	"fmt"
 
 	"github.com/hashicorp/go-cty-funcs/cidr"
 	"github.com/hashicorp/go-cty-funcs/collection"
@@ -226,12 +225,3 @@ var TextDecodeBase64Func = function.New(&function.Spec{
 		return cty.StringVal(string(decoded)), nil
 	},
 })
-
-var unimplFunc = function.New(&function.Spec{
-	Type: func([]cty.Value) (cty.Type, error) {
-		return cty.DynamicPseudoType, fmt.Errorf("function not yet implemented")
-	},
-	Impl: func([]cty.Value, cty.Type) (cty.Value, error) {
-		return cty.DynamicVal, fmt.Errorf("function not yet implemented")
-	},
-})
diff --git a/hcl2template/types.packer_config_test.go b/hcl2template/types.packer_config_test.go
index fb3a433f8b0..708a80f76ec 100644
--- a/hcl2template/types.packer_config_test.go
+++ b/hcl2template/types.packer_config_test.go
@@ -21,7 +21,6 @@ import (
 var (
 	refVBIsoUbuntu1204  = SourceRef{Type: "virtualbox-iso", Name: "ubuntu-1204"}
 	refAWSEBSUbuntu1604 = SourceRef{Type: "amazon-ebs", Name: "ubuntu-1604"}
-	refAWSV3MyImage     = SourceRef{Type: "amazon-v3-ebs", Name: "my-image"}
 	refNull             = SourceRef{Type: "null", Name: "test"}
 	pTrue               = pointerToBool(true)
 )
diff --git a/packer/plugin-getter/plugins_test.go b/packer/plugin-getter/plugins_test.go
index de84cc8a923..ca53500b1d7 100644
--- a/packer/plugin-getter/plugins_test.go
+++ b/packer/plugin-getter/plugins_test.go
@@ -26,10 +26,6 @@ var (
 	pluginFolderOne = filepath.Join("testdata", "plugins")
 
 	pluginFolderTwo = filepath.Join("testdata", "plugins_2")
-
-	pluginFolderThree = filepath.Join("testdata", "plugins_3")
-
-	pluginFolderWrongChecksums = filepath.Join("testdata", "wrong_checksums")
 )
 
 func TestChecksumFileEntry_init(t *testing.T) {
diff --git a/packer/plugin.go b/packer/plugin.go
index 5939d6aa6ab..79326f23af2 100644
--- a/packer/plugin.go
+++ b/packer/plugin.go
@@ -20,11 +20,6 @@ import (
 	plugingetter "github.com/hashicorp/packer/packer/plugin-getter"
 )
 
-var defaultChecksummer = plugingetter.Checksummer{
-	Type: "sha256",
-	Hash: sha256.New(),
-}
-
 // PluginConfig helps load and use packer plugins
 type PluginConfig struct {
 	PluginDirectory string
diff --git a/packer/plugin_discover_test.go b/packer/plugin_discover_test.go
index 2098d07bdb0..9ffa3712a1c 100644
--- a/packer/plugin_discover_test.go
+++ b/packer/plugin_discover_test.go
@@ -250,35 +250,6 @@ func TestMultiPlugin_defaultName_each_plugin_type(t *testing.T) {
 	}
 }
 
-func generateFakePlugins(dirname string, pluginNames []string) (string, []string, func(), error) {
-	dir, err := os.MkdirTemp("", dirname)
-	if err != nil {
-		return "", nil, nil, fmt.Errorf("failed to create temporary test directory: %v", err)
-	}
-
-	cleanUpFunc := func() {
-		os.RemoveAll(dir)
-	}
-
-	var suffix string
-	if runtime.GOOS == "windows" {
-		suffix = ".exe"
-	}
-
-	plugins := make([]string, len(pluginNames))
-	for i, plugin := range pluginNames {
-		plug := filepath.Join(dir, plugin+suffix)
-		plugins[i] = plug
-		_, err := os.Create(plug)
-		if err != nil {
-			cleanUpFunc()
-			return "", nil, nil, fmt.Errorf("failed to create temporary plugin file (%s): %v", plug, err)
-		}
-	}
-
-	return dir, plugins, cleanUpFunc, nil
-}
-
 // TestHelperProcess isn't a real test. It's used as a helper process
 // for multi-component plugin tests.
 func TestHelperPlugins(t *testing.T) {
diff --git a/packer/provisioner.go b/packer/provisioner.go
index c7761adeb5f..81dce0ecfc0 100644
--- a/packer/provisioner.go
+++ b/packer/provisioner.go
@@ -7,7 +7,6 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"sync"
 	"time"
 
 	"github.com/hashicorp/hcl/v2/hcldec"
@@ -205,10 +204,6 @@ func (r *RetriedProvisioner) Provision(ctx context.Context, ui packersdk.Ui, com
 // press before the provisioner is actually run.
 type DebuggedProvisioner struct {
 	Provisioner packersdk.Provisioner
-
-	cancelCh chan struct{}
-	doneCh   chan struct{}
-	lock     sync.Mutex
 }
 
 func (p *DebuggedProvisioner) ConfigSpec() hcldec.ObjectSpec { return p.ConfigSpec() }
diff --git a/post-processor/checksum/post-processor_test.go b/post-processor/checksum/post-processor_test.go
index 6a08f029735..cf871432d9d 100644
--- a/post-processor/checksum/post-processor_test.go
+++ b/post-processor/checksum/post-processor_test.go
@@ -17,8 +17,6 @@ import (
 	"github.com/hashicorp/packer/builder/file"
 )
 
-const expectedFileContents = "Hello world!"
-
 func TestChecksumSHA1(t *testing.T) {
 	const config = `
 	{