diff --git a/include/kunit/test.h b/include/kunit/test.h
index f7b2ed4c..d49cdb4 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -84,6 +84,10 @@ struct kunit_resource {
 /* Size of log associated with test. */
 #define KUNIT_LOG_SIZE	512
 
+/* TAP specifies subtest indentation of 4 spaces. */
+#define KUNIT_INDENT	"    "
+#define KUNIT_INDENT2	KUNIT_INDENT KUNIT_INDENT
+
 /**
  * struct kunit_case - represents an individual test case.
  *
@@ -395,7 +399,8 @@ static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp)
 	} while (0)
 
 #define kunit_printk(lvl, test, fmt, ...)				\
-	kunit_log(lvl, test, "\t# %s: " fmt, (test)->name, ##__VA_ARGS__)
+	kunit_log(lvl, test, KUNIT_INDENT "# %s: " fmt, (test)->name,	\
+		  ##__VA_ARGS__)
 
 /**
  * kunit_info() - Prints an INFO level message associated with @test.
diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c
index b24bebc..17b0214 100644
--- a/lib/kunit/assert.c
+++ b/lib/kunit/assert.c
@@ -6,6 +6,7 @@
  * Author: Brendan Higgins <brendanhiggins@google.com>
  */
 #include <kunit/assert.h>
+#include <kunit/test.h>
 
 #include "string-stream.h"
 
@@ -53,12 +54,12 @@ void kunit_unary_assert_format(const struct kunit_assert *assert,
 	kunit_base_assert_format(assert, stream);
 	if (unary_assert->expected_true)
 		string_stream_add(stream,
-				 "\tExpected %s to be true, but is false\n",
-				 unary_assert->condition);
+				  KUNIT_INDENT "Expected %s to be true, but is false\n",
+				  unary_assert->condition);
 	else
 		string_stream_add(stream,
-				 "\tExpected %s to be false, but is true\n",
-				 unary_assert->condition);
+				  KUNIT_INDENT "Expected %s to be false, but is true\n",
+				  unary_assert->condition);
 	kunit_assert_print_msg(assert, stream);
 }
 EXPORT_SYMBOL_GPL(kunit_unary_assert_format);
@@ -72,13 +73,13 @@ void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
 	kunit_base_assert_format(assert, stream);
 	if (!ptr_assert->value) {
 		string_stream_add(stream,
-				 "\tExpected %s is not null, but is\n",
-				 ptr_assert->text);
+				  KUNIT_INDENT "Expected %s is not null, but is\n",
+				  ptr_assert->text);
 	} else if (IS_ERR(ptr_assert->value)) {
 		string_stream_add(stream,
-				 "\tExpected %s is not error, but is: %ld\n",
-				 ptr_assert->text,
-				 PTR_ERR(ptr_assert->value));
+				  KUNIT_INDENT "Expected %s is not error, but is: %ld\n",
+				  ptr_assert->text,
+				  PTR_ERR(ptr_assert->value));
 	}
 	kunit_assert_print_msg(assert, stream);
 }
@@ -92,16 +93,16 @@ void kunit_binary_assert_format(const struct kunit_assert *assert,
 
 	kunit_base_assert_format(assert, stream);
 	string_stream_add(stream,
-			 "\tExpected %s %s %s, but\n",
-			 binary_assert->left_text,
-			 binary_assert->operation,
-			 binary_assert->right_text);
-	string_stream_add(stream, "\t\t%s == %lld\n",
-			 binary_assert->left_text,
-			 binary_assert->left_value);
-	string_stream_add(stream, "\t\t%s == %lld",
-			 binary_assert->right_text,
-			 binary_assert->right_value);
+			  KUNIT_INDENT "Expected %s %s %s, but\n",
+			  binary_assert->left_text,
+			  binary_assert->operation,
+			  binary_assert->right_text);
+	string_stream_add(stream, KUNIT_INDENT2 "%s == %lld\n",
+			  binary_assert->left_text,
+			  binary_assert->left_value);
+	string_stream_add(stream, KUNIT_INDENT "%s == %lld",
+			  binary_assert->right_text,
+			  binary_assert->right_value);
 	kunit_assert_print_msg(assert, stream);
 }
 EXPORT_SYMBOL_GPL(kunit_binary_assert_format);
@@ -114,16 +115,16 @@ void kunit_binary_ptr_assert_format(const struct kunit_assert *assert,
 
 	kunit_base_assert_format(assert, stream);
 	string_stream_add(stream,
-			 "\tExpected %s %s %s, but\n",
-			 binary_assert->left_text,
-			 binary_assert->operation,
-			 binary_assert->right_text);
-	string_stream_add(stream, "\t\t%s == %pK\n",
-			 binary_assert->left_text,
-			 binary_assert->left_value);
-	string_stream_add(stream, "\t\t%s == %pK",
-			 binary_assert->right_text,
-			 binary_assert->right_value);
+			  KUNIT_INDENT "Expected %s %s %s, but\n",
+			  binary_assert->left_text,
+			  binary_assert->operation,
+			  binary_assert->right_text);
+	string_stream_add(stream, KUNIT_INDENT2 "%s == %pK\n",
+			  binary_assert->left_text,
+			  binary_assert->left_value);
+	string_stream_add(stream, KUNIT_INDENT2 "%s == %pK",
+			  binary_assert->right_text,
+			  binary_assert->right_value);
 	kunit_assert_print_msg(assert, stream);
 }
 EXPORT_SYMBOL_GPL(kunit_binary_ptr_assert_format);
@@ -136,16 +137,16 @@ void kunit_binary_str_assert_format(const struct kunit_assert *assert,
 
 	kunit_base_assert_format(assert, stream);
 	string_stream_add(stream,
-			 "\tExpected %s %s %s, but\n",
-			 binary_assert->left_text,
-			 binary_assert->operation,
-			 binary_assert->right_text);
-	string_stream_add(stream, "\t\t%s == %s\n",
-			 binary_assert->left_text,
-			 binary_assert->left_value);
-	string_stream_add(stream, "\t\t%s == %s",
-			 binary_assert->right_text,
-			 binary_assert->right_value);
+			  KUNIT_INDENT "Expected %s %s %s, but\n",
+			  binary_assert->left_text,
+			  binary_assert->operation,
+			  binary_assert->right_text);
+	string_stream_add(stream, KUNIT_INDENT2 "%s == %s\n",
+			  binary_assert->left_text,
+			  binary_assert->left_value);
+	string_stream_add(stream, KUNIT_INDENT2 "%s == %s",
+			  binary_assert->right_text,
+			  binary_assert->right_value);
 	kunit_assert_print_msg(assert, stream);
 }
 EXPORT_SYMBOL_GPL(kunit_binary_str_assert_format);
diff --git a/lib/kunit/test.c b/lib/kunit/test.c
index 908e643..3fdc1f9 100644
--- a/lib/kunit/test.c
+++ b/lib/kunit/test.c
@@ -96,7 +96,7 @@ static void kunit_print_ok_not_ok(void *test_or_suite,
 			kunit_status_to_string(is_ok),
 			test_number, description);
 	else
-		kunit_log(KERN_INFO, test, "\t%s %zd - %s",
+		kunit_log(KERN_INFO, test, KUNIT_INDENT "%s %zd - %s",
 			  kunit_status_to_string(is_ok),
 			  test_number, description);
 }
