diff --git a/sw/device/lib/testing/json/command.h b/sw/device/lib/testing/json/command.h
index 8980089..a0886f8 100644
--- a/sw/device/lib/testing/json/command.h
+++ b/sw/device/lib/testing/json/command.h
@@ -20,6 +20,10 @@
     value(_, SpiWaitForUpload) \
     value(_, SpiWriteStatus) \
     value(_, SpiWriteSfdp) \
+    value(_, SpiFlashReadId) \
+    value(_, SpiFlashReadSfdp) \
+    value(_, SpiFlashEraseSector) \
+    value(_, SpiFlashWrite) \
     value(_, SwStrapRead)
 UJSON_SERDE_ENUM(TestCommand, test_command_t, ENUM_TEST_COMMAND);
 
diff --git a/sw/device/lib/testing/json/spi_passthru.h b/sw/device/lib/testing/json/spi_passthru.h
index 84159a6..c9bcafa 100644
--- a/sw/device/lib/testing/json/spi_passthru.h
+++ b/sw/device/lib/testing/json/spi_passthru.h
@@ -36,6 +36,31 @@
     field(data, uint8_t, 256)
 UJSON_SERDE_STRUCT(UploadInfo, upload_info_t, STRUCT_UPLOAD_INFO);
 
+#define STRUCT_SPI_FLASH_READ_ID(field, string) \
+    field(device_id, uint16_t) \
+    field(manufacturer_id, uint8_t) \
+    field(continuation_len, uint8_t)
+UJSON_SERDE_STRUCT(SpiFlashReadId, spi_flash_read_id_t,
+    STRUCT_SPI_FLASH_READ_ID);
+
+#define STRUCT_SPI_FLASH_READ_SFDP(field, string) \
+    field(address, uint32_t) \
+    field(length, uint16_t)
+UJSON_SERDE_STRUCT(SpiFlashReadSfdp, spi_flash_read_sfdp_t,
+    STRUCT_SPI_FLASH_READ_SFDP);
+
+#define STRUCT_SPI_FLASH_ERASE_SECTOR(field, string) \
+    field(address, uint32_t) \
+    field(addr4b, bool)
+UJSON_SERDE_STRUCT(SpiFlashEraseSector, spi_flash_erase_sector_t, STRUCT_SPI_FLASH_ERASE_SECTOR);
+
+#define STRUCT_SPI_FLASH_WRITE(field, string) \
+    field(address, uint32_t) \
+    field(addr4b, bool) \
+    field(data, uint8_t, 256) \
+    field(length, uint16_t)
+UJSON_SERDE_STRUCT(SpiFlashWrite, spi_flash_write_t, STRUCT_SPI_FLASH_WRITE);
+
 // clang-format on
 #ifdef __cplusplus
 }
diff --git a/sw/host/opentitanlib/src/test_utils/spi_passthru.rs b/sw/host/opentitanlib/src/test_utils/spi_passthru.rs
index a44814e..ae2e131 100644
--- a/sw/host/opentitanlib/src/test_utils/spi_passthru.rs
+++ b/sw/host/opentitanlib/src/test_utils/spi_passthru.rs
@@ -55,3 +55,38 @@
         Self::recv(uart, Duration::from_secs(300), false)
     }
 }
+
+impl SpiFlashReadId {
+    pub fn execute(uart: &dyn Uart) -> Result<Self> {
+        TestCommand::SpiFlashReadId.send(uart)?;
+        let data = SpiFlashReadId::recv(uart, Duration::from_secs(300), false)?;
+        Ok(data)
+    }
+}
+
+impl SpiFlashReadSfdp {
+    pub fn execute(&self, uart: &dyn Uart) -> Result<SfdpData> {
+        TestCommand::SpiFlashReadSfdp.send(uart)?;
+        self.send(uart)?;
+        let sfdp = SfdpData::recv(uart, Duration::from_secs(300), false)?;
+        Ok(sfdp)
+    }
+}
+
+impl SpiFlashEraseSector {
+    pub fn execute(&self, uart: &dyn Uart) -> Result<()> {
+        TestCommand::SpiFlashEraseSector.send(uart)?;
+        self.send(uart)?;
+        Status::recv(uart, Duration::from_secs(300), false)?;
+        Ok(())
+    }
+}
+
+impl SpiFlashWrite {
+    pub fn execute(&self, uart: &dyn Uart) -> Result<()> {
+        TestCommand::SpiFlashWrite.send(uart)?;
+        self.send(uart)?;
+        Status::recv(uart, Duration::from_secs(300), false)?;
+        Ok(())
+    }
+}