diff --git a/llvm/test/MC/SBF/sbf-include-basic.s b/llvm/test/MC/SBF/sbf-include-basic.s
new file mode 100644
index 0000000000000..7a423a454a573
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-basic.s
@@ -0,0 +1,22 @@
+# RUN: llvm-mc %s -triple=sbf-solana-solana -filetype=obj -I %p -o %t.o
+# RUN: llvm-objdump -d %t.o | FileCheck %s --check-prefix=CHECK-OBJ
+
+# Test basic .include directive functionality for SBF
+
+.include "sbf-include-helper.s"
+
+.text
+.globl entrypoint
+entrypoint:
+  call custom_log
+  exit
+
+# CHECK-OBJ: lddw
+# CHECK-OBJ: r1
+# CHECK-OBJ: lddw
+# CHECK-OBJ: r2, 0xe
+# CHECK-OBJ: call
+# CHECK-OBJ: exit
+# CHECK-OBJ: <entrypoint>:
+# CHECK-OBJ: call
+# CHECK-OBJ: exit
diff --git a/llvm/test/MC/SBF/sbf-include-globl-helper.s b/llvm/test/MC/SBF/sbf-include-globl-helper.s
new file mode 100644
index 0000000000000..df30bf9939f1a
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-globl-helper.s
@@ -0,0 +1,9 @@
+# Helper file for sbf-include-no-globl.s
+# This file contains a .globl directive which should produce an error
+# when included
+
+.text
+.globl helper_fn
+helper_fn:
+  mov64 r0, 0
+  exit
diff --git a/llvm/test/MC/SBF/sbf-include-helper.s b/llvm/test/MC/SBF/sbf-include-helper.s
new file mode 100644
index 0000000000000..0ff40fd6fa44c
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-helper.s
@@ -0,0 +1,11 @@
+# Helper file for sbf-include-basic.s
+# This file defines a simple function that can be included
+
+custom_log:
+    lddw r1, message
+    lddw r2, 14
+    call sol_log_
+    exit
+
+.rodata
+    message: .ascii "Hello, Solana!"
diff --git a/llvm/test/MC/SBF/sbf-include-missing.s b/llvm/test/MC/SBF/sbf-include-missing.s
new file mode 100644
index 0000000000000..ba74b616ddebe
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-missing.s
@@ -0,0 +1,15 @@
+# RUN: not llvm-mc %s -triple=sbf-solana-solana -filetype=obj -I %p 2>&1 \
+# RUN:     | FileCheck %s --check-prefix=CHECK
+
+# Test that including a non-existent file produces an error
+
+# CHECK: error:
+# CHECK: Could not find include file
+# CHECK: nonexistent_file.s
+
+.include "nonexistent_file.s"
+
+.text
+.globl entrypoint
+entrypoint:
+  exit
diff --git a/llvm/test/MC/SBF/sbf-include-nested-inner.s b/llvm/test/MC/SBF/sbf-include-nested-inner.s
new file mode 100644
index 0000000000000..2e3e78dcea27f
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-nested-inner.s
@@ -0,0 +1,11 @@
+# Inner file for nested include test
+# This file is included by sbf-include-nested-middle.s
+
+custom_log:
+    lddw r1, message
+    lddw r2, 7
+    call sol_log_
+    exit
+
+.rodata
+    message: .ascii "Nested!"
diff --git a/llvm/test/MC/SBF/sbf-include-nested-middle.s b/llvm/test/MC/SBF/sbf-include-nested-middle.s
new file mode 100644
index 0000000000000..ace9429d97c9e
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-nested-middle.s
@@ -0,0 +1,4 @@
+# Middle file for nested include test
+# This file is included by sbf-include-nested.s and includes the inner file
+
+.include "sbf-include-nested-inner.s"
diff --git a/llvm/test/MC/SBF/sbf-include-nested.s b/llvm/test/MC/SBF/sbf-include-nested.s
new file mode 100644
index 0000000000000..c3596c933af06
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-nested.s
@@ -0,0 +1,22 @@
+# RUN: llvm-mc %s -triple=sbf-solana-solana -filetype=obj -I %p -o %t.o
+# RUN: llvm-objdump -d %t.o | FileCheck %s --check-prefix=CHECK-OBJ
+
+# Test nested .include directive functionality for SBF
+
+.include "sbf-include-nested-middle.s"
+
+.text
+.globl entrypoint
+entrypoint:
+  call custom_log
+  exit
+
+# CHECK-OBJ: lddw
+# CHECK-OBJ: r1
+# CHECK-OBJ: lddw
+# CHECK-OBJ: r2, 0x7
+# CHECK-OBJ: call
+# CHECK-OBJ: exit
+# CHECK-OBJ: <entrypoint>:
+# CHECK-OBJ: call
+# CHECK-OBJ: exit
diff --git a/llvm/test/MC/SBF/sbf-include-no-globl.s b/llvm/test/MC/SBF/sbf-include-no-globl.s
new file mode 100644
index 0000000000000..984b75b391576
--- /dev/null
+++ b/llvm/test/MC/SBF/sbf-include-no-globl.s
@@ -0,0 +1,16 @@
+# RUN: not llvm-mc %s -triple=sbf-solana-solana -filetype=obj -I %p 2>&1 \
+# RUN:     | FileCheck %s --check-prefix=CHECK
+
+# Test that .globl in an included file produces an error for SBF
+
+# CHECK: error:
+# CHECK: .globl 'helper_fn' is not allowed in included files
+# CHECK: Only the main entrypoint file should declare .globl symbols
+
+.include "sbf-include-globl-helper.s"
+
+.text
+.globl entrypoint
+entrypoint:
+  call helper_fn
+  exit